Explain with equations and calculations, when necessary, whether an aqueous solution of each of these salts is acidic, basic, or neutral:(ZnCH₃COO)₂
Answers
Zinc acetate is a basic salt.
Because zinc acetate is water soluble, it will entirely separate into its ions. As a result, Zn(C2H3O2)2 is regarded as a strong electrolyte.
Salts, basic, such as ZINC ACETATE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.
ZnO + 2(CH3COOH) ----> Zn(C2H3O2)2
Electrolytes will conduct electricity when they are dissolved in water. Strong electrolyte Zn(C2H3O2)2 totally dissociates into its ions in water, causing the solution to conduct electricity.
Where is zinc acetate used ?Some medications, such as lozenges for the treatment of the common cold, have zinc acetate as a component. Zinc acetate is a food supplement as well. It is taken as an oral daily supplement to prevent the body from absorbing copper as part of the management of Wilson's disease. Zinc acetate is also offered as a topical astringent in the form of an ointment, a lotion, or in combination with an antibiotic like erythromycin. Topical anti-itch ointments are frequently offered with it.
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Related Questions
________ iron is found in some foods that provide all the amino acids humans require for the absorption of iron.
Answers
Non-heme iron is found in some foods that provide all the amino acids humans require for the absorption of iron.
What are amino acids?Amino acids are defined as the substances which are considered to be the monomers of proteins.Every amino acid has the same structure which consists of a central carbon bonded to an amino group , carboxyl group and a hydrogen.
Each amino acid also has an another atom or a group of atoms bonded to the alpha carbon which are also known as the R group or the variable group of the side chain.There are 20 common amino acids which are present in natural proteins and each amino acid has the same backbone.
The sequence and number of amino acids determines protein's shape,size and also its function. Each amino acid is attached to the other by a covalent bond formed by a dehydration reaction.
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A student prepares a standardized solution of sodium hydroxide by the following procedure. The student first prepares a saturated solution of sodium hydroxide using freshly distilled or deionized water. She measures about 5 mL with a graduated cylinder and dilutes to 1 L in a plastic bottle with freshly distilled or deionized water to make a solution that is about 0.1 M. To determine the exact concentration she puts the NaOH solution in a buret and titrates a carefully-weighed pre-dried solid acid of known molar mass. She records the volume of NaOH needed to neutralize it and repeats the process several times to determine the concentration of the NaOH solution. She calculates the concentration and uncertainty in the concentration of the NaOH from the titration data. Why can\'t the student just weigh the sodium hydroxide directly to make a standard? Select all that apply. NaOH pellets react with water. NaOH pellets react with oxygen. NaOH pellets react with hydrogen. NaOH pellets react with carbon dioxide. NaOH pellets react with nitrogen. Why did the student first prepare a saturated solution? A. Saturated solutions are higher in purity than unsaturated solutions. B. Unsaturated NaOH solutions are light-sensitive. C. She can calculate the concentration of the saturated NaOH solution from the Ksp of NaOH. D. Any sodium hydrogen carbonate formed by the reaction of NaOH with atmospheric carbon dioxide will precipitate in the saturated solution. The student prepares the NaOH solution of high purity but unknown concentration by taking about 5 mL of the supernatant at the top of the saturated solution adding it to a plastic bottle with about 1 L of freshly distilled or deionized water. The bottom of the solution contains some white solids which are likely to be (select all correct answers): sodium hydroxide sodium hydrogen sulfate sodium silicate CO2(s) H2O(s) phthalic acid sodium hydrogen carbonate Why is a plastic bottle is generally preferred to glass bottle during the above step? A. The reaction between sodium hydroxide and plastic produces plastic hydroxide. B. Sodium hydroxide renders plastic inert by a process called passivation. C. Sodium hydroxide reacts slowly with glass, forming sodium silicate. D. Sodium hydroxide reacts with polyethylene. The concentration of saturated NaOH is 50.0% w/w and the density is 1.52 g/mL. If exactly 4.00 mL were diluted to 1.000 L, what would be the concentration? Why is potassium acid phthalate (KHC8H4O4, MM = 204.227 g/mol) so widely used as a standard in acid-base titrations? Select all that apply. It is stable to air It is expensive It is easy to dry It has a slowly changing pH at the equivalence point It has a relatively high molar mass It is available in high purity A student dries the pure potassium acid phthalate (KHC8H4O4) in the oven overnight to A. remove water B. purify the matrix C. remove carbon dioxide adn sulfer dioxide D. anneal the crystal structure She weighs 0.1553 g of dry potassium acid phthalate into a flask and adds some water from a graduated cylinder to dissolve it. Why doesn\'t she measure the volume of water with a more accurate device? A. The accuracy of the graduated cylinder is sufficient to measure to two decimal places which is all the precision needed for a titration. B. It would be better to measure the mass because it can be read to four decimal places with an analytical balance. C. The quantity of water actually is important and should be measured accurately because it affects the starting concentration thus the starting pH of the solution. D. The volume of water added is not important because the titration equivalence point depends only on the number of millimoles of potassium acid phthalate and not its concentration. The titration of 0.1553 g of dry potassium acid phthalate (MM = 204.227 g/mol) requires 49.84 mL of NaOH solution. What is the concentration of the NaOH solution? Why is freshly distilled or deionized water used in this standardization? A. Freashly distilled water contains no hydrogen peroxide B. Distilles water contains calcium, which stabilizes the sodium hydroxide C. Freashly deionized water has a pH of 4.72 D. There is little CO2 in freshly deionized or distilled water
Answers
NaOH has the characteristic of being deliquescent; hence, it cannot be weighed directly; rather, a saturated solution is diluted to get the appropriate concentration.
The process of deliquescent is explained using sodium hydroxide.
When a material absorbs moisture and carbon dioxide from the air to the point that it becomes dissolved and forms a solution, this process is known as deliquescence.
Who or what uses hydroxide?To make soap, rayon, paper, explosive materials, colors, and petroleum products, manufacturers can employ sodium hydroxide. Processing cotton fabric, cleaning and processing metal, applying an oxide layer, electroplating, and electrolytic extraction are further uses for sodium hydroxide.
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All good leaving groups are _____ bases with relatively _____ conjugate acids that have _____ pKa values.
Answers
All good leaving groups are weak bases with relatively strong conjugate acids that have low pKa values.
Leaving groups are defined as the atoms or groups of atoms that dissociate from a molecule, along with an electron pair, during a chemical reaction. A good leaving group is one that can depart easily from the molecule, without forming a highly unstable intermediate.
In general, weak bases make good leaving groups because they can easily accept a proton and form a stable conjugate acid. Strong bases, on the other hand, are less likely to act as leaving groups because they are less willing to accept a proton and form a conjugate acid.
The pKa value of the conjugate acid of a leaving group is also an important factor, as a lower pKa indicates a stronger acid and a more stable conjugate base. A more stable conjugate base is more likely to form and stabilize after the leaving group departs, making the reaction more favorable.
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Calculate the molality of 12 percent urea solution
Answers
Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The formula for molality is given by the following equation:molality (m) = moles of solute / mass of solvent (in kg)In order to calculate the molality of a 12 percent urea solution, we need to first determine the mass of urea present in the solution.
We know that a 12 percent urea solution means that 12 grams of urea is present in 100 grams of the solution. Therefore, we can calculate the mass of urea in the solution as follows:Mass of urea = (12/100) x 200 g= 24 gNext, we need to convert this mass into moles. The molar mass of urea is 60.06 g/mol. Therefore, the number of moles of urea present in the solution can be calculated as follows:Number of moles of urea = Mass of urea / Molar mass of urea= 24 g / 60.06 g/mol= 0.3996 molFinally, we can use the formula for molality to calculate the molality of the solution as follows:molality (m) = moles of solute / mass of solvent (in kg)= 0.3996 mol / 0.2 kg= 1.998 mol/kgTherefore, the molality of the 12 percent urea solution is approximately 1.998 mol/kg.For such more question on moles
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Help please it’s confusing to me
Answers
Answer:
B, H, E, G, C, D, A, F
Explanation:
The ones closest to the bottom are the oldest
What are the products of the acid-base reaction between hclo3 and lioh? liclo4 h2o lih liclo3 hclo4
Answers
The products of the acid-base reaction between chloric acid \((HClO_{3})\), and lithium hydroxide \((LiOH)\), are water \((H_{2}O)\) and lithium chlorate \((LiClO_{3} )\)
An acid-base reaction is a chemical reaction that occurs between an acid and a base producing salt and water. It is a double-replacement reaction where ions exchange their positions.
The general equation of an acid-base reaction is as follows.
Acid + Base → Salt + Water
The H(+) cation of the acid combines with the OH(-) anion of the base to form water. The compound formed by the cation of the base and the anion of the acid is called a salt.
For the reaction between chloric acid \((HClO_{3})\), and lithium hydroxide \((LiOH)\), the H(+) cation of the acid \((HClO_{3})\) combines with the OH(-) anion of the base \((LiOH)\) to form water. The compound formed by the cation of the base \((LiOH)\) and the anion of the acid \((HClO_{3})\) is lithium chlorate.
\(H^{+}+ ClO_{3}^{-} +Li^{+} +OH^{-} = LiClO_{3} + H_{2}O\)
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A 1.25 g sample of aluminum is reacted with 3.28 g of copper (II) sulfate. What is the limiting reactant?
2Al(s) + 3CuSO4(aq) = Al2(SO4)3(aq) + 3Cu(s)
Select one:
a. Copper
b. Aluminum sulfate
c. Aluminum
d. Copper (II) sulfate
Answers
Answer:
d. Copper (II) sulfate
Explanation:
Given data:
Mass of Al = 1.25 g
Mass of CuSO₄ = 3.28 g
What is limiting reactant = ?
Solution:
Chemical equation:
2Al + 3CuSO₄ → Al₂ (SO₄)₃ + 3Cu
Number of moles of Al:
Number of moles = mass/molar mass
Number of moles = 1.25 g/ 27 g/mol
Number of moles = 0.05 mol
Number of moles of CuSO₄:
Number of moles = mass/molar mass
Number of moles = 3.28 g/ 159.6 g/mol
Number of moles = 0.02 mol
now we will compare the moles of reactant with product.
Al : Al₂ (SO₄)₃
2 : 1
0.05 : 1/2×0.05=0.025 mol
Al : Cu
2 : 3
0.05 : 3/2×0.05 = 0.075 mol
CuSO₄ : Al₂ (SO₄)₃
3 : 1
0.02 : 1/3×0.02=0.007 mol
CuSO₄ : Cu
3 : 3
0.02 : 0.02
Less number of moles of reactants are produced by CuSO₄ thus it will act as limiting reactant.
The following symbol (<-->) means
Answers
Answer:
Greater than or less than
What information does a radioactive element's half-life tell you about that element?
Answers
A sample of gas occupies a volume of 55.3 L, has a temperature of 23.3 °C and a pressure of .658 atm. Calculate the number of moles of gas which are present in the sample. R= .0821 atm L/mol K
Answers
Answer: The number of moles of gas which are present in the sample are 1.49 mol.
Explanation:
Given: Volume = 55.3 L
Temperature = \(23.3^{o}C\) = (23.3 + 273) K = 296.3 K
Pressure = 0.658 atm
Formula used is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
\(PV = nRT\\0.658 atm \times 55.3 L = n \times 0.0821 L atm/mol K \times 296.3 K\\n = \frac{0.658 atm \times 55.3 L}{0.0821 L atm/mol K \times 296.3 K}\\= \frac{36.3874}{24.32623}\\= 1.49 mol\)
Thus, we can conclude that the number of moles of gas which are present in the sample are 1.49 mol.
2.00 mol of helium and 1.00 mol of argon are separated by a very thin barrier. initially the helium has 7500 j of thermal energy. the helium gains 2500 j of energy as the gases interact and come to thermal equilibrium by exchanging energy via collisions at the boundary. what was the initial temperature of the argon?
Answers
The initial temperature of argon is approximately 185.19 K.
To determine the initial temperature of argon, we can use the concept of thermal equilibrium.
In thermal equilibrium, the total thermal energy of the system remains constant. Since the helium gains 2500 J of energy, the argon must have lost an equal amount of energy to reach equilibrium.
Given that the initial thermal energy of helium is 7500 J and it gains 2500 J, the total thermal energy of the system after the exchange is 7500 J + 2500 J = 10000 J.
Since the helium and argon are at thermal equilibrium, their combined thermal energy is constant. Therefore, the initial thermal energy of argon must have been 10000 J - 7500 J = 2500 J.
To determine the initial temperature of argon, we can use the equation:
thermal energy (J) = (number of moles) × (molar specific heat) × (temperature change)
The molar specific heat capacity of an ideal gas at constant volume (Cv) is approximately 3R/2, where R is the ideal gas constant (8.314 J/(mol·K)).
Let's assume the initial temperature of argon is T K. Using the equation above, we can set up the following equation:
2500 J = (1 mol) × (3R/2) × (T - T(initial))
Since the argon is initially at a higher temperature than the final equilibrium temperature, we can assume that T(initial) > T.
Simplifying the equation:
2500 J = (1 mol) × (3R/2) × (-T(initial))
Solving for T(initial):
T(initial) = -2500 J / ((1 mol) × (3R/2))
T(initial) = -2500 J / (1.5 mol × 3R)
T(initial) ≈ -185.19 K
The negative sign indicates that the initial temperature of argon is lower than the final equilibrium temperature. However, negative temperatures in this context do not have a physical meaning, so we can disregard the negative sign.
Therefore, the initial temperature of argon is approximately 185.19 K.
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A certain gas has a volume of 195 mL at 20°C and 1.00 atm. What is the its volume in mL at60°C and 600 mm Hg?
Answers
To solve this question we will assume that the moles of gas do not change and that the gas behaves like an ideal gas.
For an ideal gas we have that its behavior will be according to the following equation:
\(PV=nRT\)Where,
P is the pressure of the gas, in atm
V is the volume of the gas, in liters
n are the moles of the gas
T is the temperature of the gas, in Kelvin
R is a constant, 0.08206 atm.L/mol.K
We have for this gas two states, an initial state (1) and a final state (2), so for each state we can apply the ideal gas law, we will have:
Initial state:
\(\begin{gathered} P_1V_1=nRT_1 \\ nR=\frac{P_1V_1}{T_1} \end{gathered}\)Final state:
\(\begin{gathered} P_2V_2=nR_T_2 \\ nR=\frac{P_2V_2}{T_2} \end{gathered}\)Since nR are constants, we can equate both equations:
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)For each state the conditions of pressure, volume and temperature will be:
P1=1.00atm
V1=195mL = 0.195L
T1=20°c = 293.15K
P2= 600mmHg=0.79atm
T2=60°C=333.15K
V2=Unknown
We clear V2 and replace the known data:
\(V_2=\frac{P_1V_1}{T_1}\times\frac{T_2}{P_2}\)\(\begin{gathered} V_2=\frac{1atm\times0.195L}{293.15K}\times\frac{333.15K}{0.79atm} \\ V_2=\frac{1\times0.195\times333.15}{293.15\times0.79}L \\ V_2=0.280L=280mL \end{gathered}\)Answer: The final volume of the gas will be 280mL
Describe how innate behaviors and learned behaviors differ? If you tell me the answer i will give you a brainliest answer :)
Answers
Answer:
The difference between an innate behavior and a learned one is that innate behaviors are those an animal will engage in from birth without any intervention. Learned behavior is something an animal discovers through trial, error and observation.
Explanation:
what term is applied to the following phase change? a(g) → a(s)
Answers
The term applied to the phase change from gas to solid is known as deposition. Deposition is the opposite process of sublimation, where a solid changes directly into a gas without passing through a liquid phase.
During deposition, a gas converts directly to a solid without going through an intermediate liquid phase. This process is commonly observed in frost formation, where water vapor in the air deposits onto a surface as ice crystals. The process of deposition is an essential part of the water cycle, where water vapor in the atmosphere deposits as snow or frost on the earth's surface. The term applied to the phase change represented by the equation a(g) → a(s) is called "deposition." Deposition is a direct transition from the gaseous state (a(g)) to the solid state (a(s)) without passing through the liquid state. This process occurs when gas molecules lose a significant amount of energy and directly form a solid. Deposition is the opposite of sublimation, where a substance transitions from the solid state directly to the gaseous state. Both processes are examples of non-classical phase changes that do not involve the liquid state.
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Wiith the parameters given and hydraulic retention time= 1d, change the question to :
1) what is the BODL concentration in the aerated lagoon?
2) what is the concentration of volatile suspended solids (Xv) in the lagoon?
1. An industry has a soluble wastewater that contains a BODL of 2,000mg/l. They wish to produce an effluent BODL of 1,000mg/l. Pilot studies showed that the appropriate kinetic parameters are: q^KbYfd=27mgBODL/mgVSSa−d=10mgBODL/l=0.2/d=0.5mgVSSa/mgBODL=0.8 The industry wants to treat the wastewater with an aerated lagoon, which can be considered a chemostat with θ=1 d. Will they likely meet the desired effluent quality if they supply adequate O2 ? Recall that the effluent BODL will be comprised of organized substrate, active cell mass, and products. About C HAPTER 7 - Lagoons how much aerator capacity is needed (in kW/1,000 m3 of tank volume), if the field oxygen transfer efficiency is 1 kgO2/kWh ?
Answers
The concentration of volatile suspended solids (Xv) in the lagoon to assess the effluent quality. However, the specific aerator capacity needed cannot be determined without additional information or equations.
To determine if the industry will likely meet the desired effluent quality, we can calculate the BODL concentration in the aerated lagoon and the concentration of volatile suspended solids (Xv) in the lagoon.
BODL concentration in the aerated lagoon:
The BODL concentration in the lagoon can be calculated using the equation:
BODL_lagoon = BODL_influent - q * Xv * θ
where BODL_influent is the initial BODL concentration (2,000 mg/l), q is the specific oxygen utilization rate (27 mgBODL/mgVSSa-d), Xv is the concentration of volatile suspended solids (to be determined), and θ is the hydraulic retention time (1 day).
Concentration of volatile suspended solids (Xv) in the lagoon:
The concentration of volatile suspended solids can be calculated using the equation:
Xv = BODL_influent / (q * θ)
where BODL_influent is the initial BODL concentration (2,000 mg/l), q is the specific oxygen utilization rate (27 mgBODL/mgVSSa-d), and θ is the hydraulic retention time (1 day).
By substituting the given values into the equations, we can calculate the BODL concentration in the lagoon and the concentration of volatile suspended solids.
Regarding the aerator capacity needed, the question asks for the amount of aerator capacity in kW/1,000 m3 of tank volume. To calculate this, we need the field oxygen transfer efficiency (1 kgO2/kWh). However, the equation or method to determine the aerator capacity based on the given information is not provided. Without additional information or equations, it is not possible to calculate the specific aerator capacity needed in this scenario.
In summary, we can calculate the BODL concentration in the aerated lagoon and the concentration of volatile suspended solids (Xv) in the lagoon to assess the effluent quality. However, the specific aerator capacity needed cannot be determined without additional information or equations.
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what do you predict for the height of a barometer column based on 1-iodododecane, when the atmospheric pressure is 752 torr ?
Answers
8.52 m is the height of a barometer column based on 1-iodododecane.
What is a barometer?A barometer is described as a scientific instrument that is used to measure air pressure in a certain environment.
For the given question we will use the below formula:
P = dgh, where
g = gravitational force = 9.8 m/s²
h = height
First we calculate the height of the barometer column for the mercury:
Density of mercury = 13.6g/ml (given)
Given pressure = 752 torr =100258.144 N/m²
Height of barometer for mercury = 100258.144 / (13.6×9.8) = 752.23= 0.752
Now we calculate the height of barometer by using the below formula:
d₁h₁ = d₂h₂, where
d₁ = density of 1-iodododecane = 1.20g/mol (given)
h₁ = to find?
d₂, h₂ = density & height with respect to mercury
On putting all values in the above equation we get,
h₁ = 13.6×0.752 / 1.20 = 8.52m
Hence, 8.52m is the height of barometer.
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Complete question:
The compound 1-iodododecane is a nonvolatile liquid with a density of 1.20g/ml. the density of mercury is 13.6g/ml. part a what do you predict for the height of a barometer column based on 1-iodododecane, when the atmospheric pressure is 752 torr ?
Which set of coefficients, when used in the order listed, will balance the following skeleton equation for the combustion of benzene, C6H6(l)?
___C6H6(l) + ___O2(g) --> ___CO2(g) + ___H2O(g)
Answers
Answer:
2, 15, 12, 6.
Explanation:
Complete them with correct formulas
Then balance them
Answers
Answer:
1. 2Ca + N\(_{2}\) → 2CaN
2. 4Li + O\(_{2}\) → 2Li\(_{2}\)O
3. 2KCl + BaF\(_2\) → 2KF + BaCl\(_2\)
4. CH\(_4\) + 2O\(_2\) → CO\(_2\) + 2H\(_2\)O
Be sure to balance the number of atoms on both sides of each equation only by adding coefficients to the compounds!!!! Those without a coefficient are meant to have a coefficient of 1.
what is the mass in grams of 1.66 moles of aspartame
Answers
Answer: a. Calculate the molar mass of aspartame. 294.3 g/mol b.
Explanation:
Answer:
\(1 \: mole \: weighs \: 294.3 \: g \\ 1.66 \: moles \: weigh \: (1.66 \times 294.3) \\ = 488.5 \: g\)
if you have 20 grams of carbon-14 and it goes through 2 half lives, how much carbon-14 is left?
Answers
Answer: I belive it is 25%. Correct me if you know the answer or think I am wrong.
Explanation:
Help me pls Idk the answers
Answers
Answer:
It goes grain of salt water molecule human skin cell then E coli bacteria
a laboratory owned by a company other than the physician’s practice is a
Answers
A laboratory owned by a company other than the physician's practice is typically referred to as an "independent laboratory" or an "external laboratory." These laboratories are separate entities from the physician's practice and may provide various diagnostic, testing, or research services. They operate independently and may serve multiple healthcare providers or organizations.
Independent laboratories play a crucial role in the healthcare industry by offering specialized testing, advanced technologies, and expertise that may not be available within a physician's practice. They often handle a wide range of laboratory services, including clinical chemistry, microbiology, pathology, genetic testing, and more.
Physicians and healthcare providers may send patient samples or specimens to independent laboratories for analysis and diagnostics. The results obtained from these laboratories can aid in accurate diagnoses, treatment decisions, and monitoring of patient health.
Overall, independent laboratories contribute to the comprehensive healthcare system by providing specialized laboratory services and collaborating with healthcare providers to deliver quality patient care.
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I need a description for the rocks mass-spectrum
Table C. Arrangement of Layers with Rock Intrusion and Description of Rocks
PLEASE I NEED THIS ALL DONE QUICKLY AS POSSIBLE
(no cheap answers either)
Answers
Shale is a type of sedimentary rock that is formed from the accumulation of clay and silt-sized particles.
Description for the rocks mass-spectrumA rock's mass-spectrum is a graph that shows the relative abundance of each element present in a rock sample. The graph is created by using a mass spectrometer, an instrument that separates the different elements in a sample by their atomic mass. The resulting graph shows the relative abundance of each element as a peak, with the height of the peak representing the concentration of that element.
From the first attachment
The Cambrian period, which occurred around 540 million years ago, is known for the development and diversification of various forms of life, The rocks from this period are typically composed of shallow marine sandstones and shales, with some limestone formations. The mass-spectrum of these rocks would likely show a high concentration of calcium and carbon, as well as traces of other elements such as silicon and oxygen.
The Ordovician period, which occurred around 490-443 million years ago, is characterized by the diversification of marine life, including the first appearance of fish and the diversification of brachiopods, bryozoa, and corals. The rocks from this period are typically composed of shallow marine sandstones and shales. The mass-spectrum of these rocks would show a high concentration of calcium and carbon,
The Silurian period, which occurred around 443-416 million years ago, is characterized by the diversification of marine life, including the first appearance of jawed fish and the diversification of coral reef communities. The mass-spectrum of these rocks would likely show a high concentration of calcium and carbon, as well as traces of other elements such as silicon and oxygen.
The Devonian period, whicoccurred around 416-359 million years ago, is characterized by the diversification of land plants and the first appearance of amphibians. The rocks from this period are typically composed of a mix of marine and terrestrial sediments, including sandstones, shales, and limestones. The mass-spectrum of these rocks would likely show a high concentration of calcium and carbon, as well as traces of other elements such as silicon and oxygen.
The Carboniferous period, which occurred around 359-299 million years ago, is characterized by the diversification of land plants, including the first appearance of trees, and the first appearance of reptiles. The rocks from this period are typically composed of a mix of marine and terrestrial sediments, including sandstones, shales, and coal deposits. The mass-spectrum of these rocks would likely show a high concentration of carbon, as well as traces of other elements such as silicon and oxygen.
The Permian period, which occurred around 299-252 million years ago, is characterized by the diversification of reptiles, including the first appearance of dinosaurs. The rocks from this period are typically composed of a mix of marine and terrestrial sediments, including sandstones, shales, and limestones. The mass-spectrum of these rocks would likely show a high concentration of calcium and carbon, as well as traces of other elements such as silicon and oxygen.
Table C description
Shale is a type of sedimentary rock that is formed from the accumulation of clay and silt-sized particles. It is typically composed of clay minerals such as illite and kaolinite, as well as other minerals like quartz and feldspar. Shale can be found in a wide variety of environments, including marine, terrestrial, and lacustrine (lake) settings. Shale that contains fossilized remains of ancient sea creatures, such as ammonites, is called Ammonite shale.Limestone is a type of sedimentary rock that is composed primarily of calcium carbonate (CaCO3). It is formed from the accumulation of shells, coral, and other marine organisms, or through the precipitation of calcium carbonate from mineral-rich water. Limestone can be found in a wide variety of environments, including marine, terrestrial, and lacustrine settings. Limestone is a major rock type used in construction and industry.Basalt is a type of igneous rock that is formed from the cooling and solidification of molten magma. It is typically composed of plagioclase feldspar and pyroxene, as well as other minerals like olivine and amphibole. Basalt is commonly found in volcanic environments, and is the most common type of rock in the Earth's oceanic crust.Trilobite is a type of fossil, rather than a rock. Trilobites are extinct arthropods, which are thought to have first appeared around 540 million years ago during the Cambrian period, and went extinct around 252 million years ago during the Permian period. They were a diverse group of animals that lived in both marine and freshwater environments, and their fossils are commonly found in shale and limestone rocks from the Paleozoic era.Learn more here on Mass spectrum of rocs https://brainly.com/question/30349684
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Subscripts in a molecular formula indicate how many of each type of ____ can be found
Answers
Answer:
Atoms
Explanation:
The molecular formula uses chemical symbols to indicate the types of atoms followed by subscripts to show the number of atoms of each type in the molecule. :)
What is a pH in biology?
Answers
Answer:
pH is a scale used to specify the acidity or basicity of an aqueous solution. Lower values correspond to solutions which are more acidic in nature, while higher values correspond to solutions which are more basic or alkaline.
Explanation:
Answer: “pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion—which ordinarily ranges between about 1 and 10−14 gram-equivalents per litre—into numbers between 0 and 14.” - my science teacher I don’t know where she gets her notes from
Explanation:
A typical triple bond____. (a) consists of one sigma bond and two Pi bonds (b) consists of three shared electron (c) consists of two sigma bonds and one Phi bond (d) consists of six shared electron pairs (e) is longer than a single bond
Answers
The typical triple bond consists of one sigma bond and two Pi bonds. The Correct option is a.
A triple bond is a type of covalent bond that involves the sharing of three electron pairs between two atoms. The three electron pairs consist of one sigma bond and two Pi bonds.
The sigma bond is formed by the overlap of two atomic orbitals directly between the bonded atoms, while the Pi bond is formed by the overlap of two atomic orbitals that are parallel to each other but perpendicular to the line between the bonded atoms.
Because of the presence of two Pi bonds, a triple bond is stronger than a double bond and a single bond, and it is also shorter in length. Triple bonds are commonly found in molecules such as nitrogen gas (N₂) and acetylene (C₂H₂). Thus, option a is correct.
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give me the best pick up line
Answers
Answer:
There is something wrong with my cell phone. It doesn't have your number in it.
Explanation:
Los alcoholes de cadenas largas presentan ________ puntos de ebullición. Asimismo, éstos al tener ________, el punto de ebullición disminuye
Answers
Answer:
Los alcoholes de cadena larga tienen altos puntos de ebullición. Además, cuando tienen ramificación, el punto de ebullición disminuye
Explanation:
El punto de ebullición de un alcohol se ve afectado, las interacciones dipolo-dipolo, las fuerzas de dispersión de van der Waals y los enlaces de hidrógeno.
Las fuerzas de las interacciones dipolo-dipolo y los enlaces de hidrógeno son más o menos las mismas en la serie de alcohol en serie, sin embargo, a medida que aumenta la longitud del alcohol, las fuerzas de dispersión de van der Waals aumentan debido al aumento de la atracción dipolo-dipolo.
Sin embargo, a medida que el alcohol se vuelve más ramificado, el área de la superficie aumenta, lo que disminuye las fuerzas de van der Waals, de modo que se requiere menos fuerza para separar las moléculas y hervir una muestra del alcohol.
Por tanto, los alcoholes de cadena larga tienen puntos de ebullición elevados. Además, cuando tienen ramificación, el punto de ebullición disminuye.
A first-order reaction is 75.0% complete in 320. s. a. What are the first and second half-lives for this reaction
Answers
The first half-life for this reaction is 263.7 s, and the second half-life is 1055.0 s.
For a first-order reaction, the integrated rate law is:
ln[A]t = -kt + ln[A]0
where [A]t is the concentration of the reactant at time t, [A]0 is the initial concentration of the reactant, k is the rate constant, and ln is the natural logarithm.
We are given that the reaction is 75% complete in 320 s. This means that [A]t/[A]0 = 0.25, since 100% - 75% = 25%. Therefore, we can write:
ln(0.25) = -k(320 s) + ln[A]0
Solving for k, we get:
k = [ln(0.25) - ln[A]0]/(-320 s)
The first half-life is the time it takes for the reaction to reach 50% completion. We can use the following equation to solve for the first half-life (t1/2):
ln(0.5) = -k(t1/2)
Substituting the value of k we just calculated, we get:
t1/2 = [ln(2)]/k
Similarly, the second half-life is the time it takes for the reaction to reach 75% completion from 50% completion, or 87.5% completion overall. We can use the following equation to solve for the second half-life (t2/2):
ln(0.875) = -k(t2/2)
Substituting the value of k we just calculated, we get:
t2/2 = [ln(0.125)]/k
Calculating these values with the given information, we get:
k = [ln(0.25) - ln(1)]/(-320 s) = 0.00263 s^-1
t1/2 = [ln(2)]/k = 263.7 s
t2/2 = [ln(0.125)]/k = 1055.0 s
Therefore, the first half-life for this reaction is 263.7 s, and the second half-life is 1055.0 s.
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Assertion: An object floats if it displaces an amount of liquid whose weight is greater than the actual weight of the object.
Reason: During floatation an object experiences no net force in the downward direction.
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false. (d) Assertion (A) is false but reason (R) is true
(d) Assertion (A) is false but reason (R) is true
Answers
Based on the assertion and the reason regarding the weight of an object and upthrust experienced by the body in a fluid; Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
The correct option is A.
What is the principle of floatation?The principle of floatation states that an object will float in a fluid if the upthrust that is experienced by the object is equal to or greater than the weight of the object.
The upthrust experienced by a body is the upward force that a liquid or gas exerts on a body floating in it.
Upthrust on a body depends on the acceleration due to gravity, the density of the liquid, and the volume of the body immersed in the liquid.
The weight of a body is the force of gravity acting on the body. The weight of a body acts downward.
Thus in a fluid, the weight of an object acts downward while the upthrust on the object acts in an upward direction.
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