The formula of Hypolaryous acid wold depend on the valency of hydrogen and the valency of Laryine. The formula of Hypolaryous acid will be HLy.
Hydrogen is an element in found in group 1 while Laryine is a halogen. Halogens are placed in group 17 while hydrogen is placed in group 1 for convenience.
Both hydrogen and Laryine have a valency of + 1. This implies that the compound formed by the two elements (Hypolaryous acid) will have the formula HLy.
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Which of the following is the end product of a natural radioactive series?
A. Stable isotopes of iodine
B. Stable isotopes of lead
C. Bismuth
D. Thorium
Answer:
Bismuth
Explanation:
The decay constant of the end product of natural radioactive series is zero because at the end of the radioactive decay, the product formed is a stable one and will not undergo any further decay in the future.
So they are asking how human activities in nature will affect the availability in synthetic materials
Dickey created the first artificial materials with memory for a template in 1949 using a silica gel matrix.
What are synthetic material?By using colors as templates and acid precipitating aqueous sodium silicate solution, imprinted silica materials were created (e.g., methyl orange).
The study of imprinted silicates and metal oxide sol-gel continued in the years that followed, and simple amorphous silicates could be imprinted for various colors, N-heterocycle aromatics, proteins, and for resolution of enantiomers.
The gel structure and surface chemistry of these materials, both of which are controlled by a wide range of variables, including catalysts, pH, solvents, age, and the composition of precursors, determine their recognition properties.
Therefore, Dickey created the first artificial materials with memory for a template in 1949 using a silica gel matrix.
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How many L in 1.98m solution using 4.2mol
The volume needed to make 1.98 M of the solution is 2.12L
Molarity of a given solution is defined as the total number of moles of solute per litre of solution. One molar is the molarity of a solution where one gram of solute is dissolved in a litre of solution. As we know, in a solution, the solvent and solute blend to form a solution, hence, the total volume of the solution is taken.
Given,
Molarity = 1.98m
Moles = 4.2 mol
Molarity = number of moles of solute / volume of solution in L
Volume = moles / molarity
= 4.2 / 1.98
= 2.12 L
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Support each answer with data and observations from this laboratory exercise. Include Lewis structures andlor sketches of the molecules that show geometry as necessary. Shown below are the structures of sulfuric acid, HzSO4, and sulfate , SO4? Showing the lengths of bonds in nm. Does sulfate exist as a resonance hybrid? What'$ the evidence? Explain your decision citing evidence from Part A
Yes, sulfate exists as a resonance hybrid.
Sulphate has six equivalent contributing structures. According to the Lewis structure in the sulphate ion, each oxygen is linked with sulphur by a double bond or a single bond. The bond order of sulfur oxygen bond in any contributor is 2,2,1 and 1. It has an average bond order of 1.5 in its equivalent hybrid structure.
Sulfuric acid, H2SO4, has two O-H bonds and two S-O bonds, as seen by its Lewis structure. The O-H bond in sulfuric acid has a length of 0.96 nm, whereas the S-O bond has a length of 1.43 nm.
The Lewis structure of sulphate, reveals that it has one double bond between an O atom and an S atom in addition to four O-S bonds. O-S and S-O bonds in sulphate were measured to be 1.48 nm and 1.50 nm, respectively, in length.
Resonance structures are used when a single Lewis structure cannot fully describe the bonding; the combination of possible resonance structures is defined as a resonance hybrid, which represents the overall delocalization of electrons within the molecule. Also, this is shown by the resonance structures of sulphate which is why it is a resonance hybrid.
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The image of the resonance structures of sulphate is given in the attachment.
A bond between a nonmetal and a nonmetal is called a(n)
bond.
A. hydrogen
B. metallic
C. covalent
D. ionic
Answer:
answer: B
Explanation:
becaucse it is B
A bond between a nonmetal and a nonmetal is called a covalent bond. The correct answer is option C.
Covalent bonding occurs when two nonmetal atoms share one or more pairs of electrons in order to achieve a stable electron configuration.
This type of bond is characterized by the sharing of electrons between the atoms, rather than the transfer of electrons as in ionic bonding.
An example of a covalent bond between two nonmetals: The bond between two oxygen atoms in an \(\rm O_2\) molecule. In this molecule, the two oxygen atoms share two pairs of electrons to form a stable covalent bond.
Therefore, option C. Covalent bond is a bond between a nonmetal and a nonmetal.
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a sample of ammonia gas occupies 20.0 ml at 585 torr and 20.0 °c. if the volume of the gas is 50.0 ml at 50.0 °c, what is the pressure?
To determine the pressure of the ammonia gas at a new volume and temperature, we can use the combined gas law, which states that the ratio of the initial pressure, volume, and temperature is equal to the ratio of the final pressure, volume, and temperature.
Using the combined gas law equation: (P1 * V1) / T1 = (P2 * V2) / T2
Given:
P1 = 585 torr (initial pressure)
V1 = 20.0 ml (initial volume)
T1 = 20.0 °C + 273.15 = 293.15 K (initial temperature)
V2 = 50.0 ml (final volume)
T2 = 50.0 °C + 273.15 = 323.15 K (final temperature)
We need to solve for P2 (final pressure).
Rearranging the equation, we have:
P2 = (P1 * V1 * T2) / (V2 * T1)
Substituting the given values into the equation:
P2 = (585 torr * 20.0 ml * 323.15 K) / (50.0 ml * 293.15 K)
Calculating this expression gives us the final pressure (P2) of the ammonia gas at the new volume and temperature.
In summary, using the combined gas law equation, we can determine the pressure of the ammonia gas at a new volume and temperature. By substituting the given values into the equation and performing the calculation, we can find the final pressure of the gas.
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Water is a pure substance. Which of the following is true about water?
A. Its compounds can only be chemically separated into the elements that make it up.
B. Its compounds can only be physically separated into the elements that make it up.
C. It is made up of a variety of compounds, each with a different set of properties.
D. It is made up of one element and one compound, each with the same properties.
A sample of brass weighing 1. 203 grams was analyzed. Brass is an alloy composed of copper, cu, and zinc, zn. The zinc in the alloy was reacted with 35. 123 grams of hydrochloric acid, hcl, in excess, according to the following balanced equation:
Based on the data provided, the (a) Mass of H2 produced = 1.0742 g ; (b) mass of zinc reacted = -35.106 g ; (c) percentage of zinc (by mass) in the alloy = 2918.6%
a) The chemical reaction between zinc and hydrochloric acid is : Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq)
Zinc reacts with hydrochloric acid to produce hydrogen gas. To find the amount of hydrogen gas produced, we'll have to convert the mass of zinc that reacted into moles and use the mole ratio between zinc and hydrogen gas.
Mass of zinc = Mass of brass - Mass of remaining solution
= 1.203 g - 36.309 g= -35.106 g (negative sign shows that we have less mass now)
Molar mass of Zn = 65.38 g/mol
Moles of Zn = Mass / Molar mass= 35.106 g / 65.38 g/mol= 0.5371 mol
The mole ratio between Zn and H2 is 1:1 (from the balanced chemical equation).
Therefore, moles of H2 produced = 0.5371 mol.
Molar mass of H2 = 2 g/mol
Mass of H2 produced = Moles of H2 × Molar mass of H2
= 0.5371 mol × 2 g/mol
= 1.0742 g
b) To calculate the mass of zinc that reacted with hydrochloric acid, we already have the mass of zinc and the mass of brass. We'll just subtract the mass of the remaining solution from the mass of brass.
Therefore, Mass of zinc reacted = Mass of brass - Mass of remaining solution
= 1.203 g - 36.309 g = -35.106 g (negative sign shows that we have less mass now)
c) We have already calculated the mass of zinc reacted which is 35.106 g. Now we need to find the percentage of zinc (by mass) in the alloy. We'll use the following formula :
Percentage of zinc (by mass) = Mass of zinc / Mass of brass × 100
Mass of brass is given as 1.203 g.
Mass of zinc is already calculated as 35.106 g.
Using the above formula :
Percentage of zinc (by mass) = 35.106 g / 1.203 g × 100 = 2918.6% (approximately)
Therefore, the percentage of zinc (by mass) in the alloy is 2918.6%.
Thus, the correct answers are : (a) 1.0742 g ; (b) -35.106 g ; (c) 2918.6%
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When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, a plot V versus P results in a ?a.hyperbola. b.parabola. c.sine curve. d.straight line.
When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot is a. hyperbola. This is due to Boyle's law.
In the study of gases, pressure and volume are two fundamental properties that are often measured and analyzed together. When studying the relationship between pressure and volume for a fixed amount of gas at a constant temperature, different types of plots can be obtained. When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot of volume (V) versus pressure (P) is a hyperbola. This is known as Boyle's law, which states that at constant temperature, the product of the pressure and volume of a gas is constant. Mathematically, this can be expressed as PV = constant.
When this relationship is graphed, we obtain a hyperbolic curve that shows that as the pressure on the gas increases, its volume decreases and vice versa. This relationship can be explained by the behavior of gas molecules. When the pressure on a gas is increased, the molecules are forced closer together, which reduces the volume of the gas. Conversely, when the pressure is decreased, the molecules have more space to move around, which increases the volume.
In contrast, a parabolic plot would result from pressure-volume measurements on a gas that obeys Charles's law, which states that at constant pressure, the volume of a gas is directly proportional to its temperature. A sine curve would result from pressure-volume measurements on a gas that obeys the ideal gas law, which takes into account the number of moles of gas and the absolute temperature. Finally, a straight line plot would result from pressure-volume measurements on a solid or liquid, which are virtually incompressible.
In conclusion, when pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot is hyperbola. This is due to Boyle's law, which states that at constant temperature, the product of the pressure and volume of a gas is constant. Understanding the relationship between pressure and volume is crucial for the study of gases and their behavior under different conditions. So the correct option is a. hyperbola.
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18. In order to make one molecule of glucose, how many carbon dioxide, ATPs, and NADPH are required?
To produce one molecule of glucose, 6 molecules of carbon dioxide (\(CO_{2}\)), 18 molecules of adenosine triphosphate (ATP), and 12 molecules of nicotinamide adenine dinucleotide phosphate (NADPH) are required.
Glucose, a six-carbon sugar, is synthesized through the process of photosynthesis in plants. It involves the Calvin cycle, which incorporates carbon dioxide, ATP, and NADPH to produce glucose. For each molecule of glucose formed, 6 molecules of carbon dioxide are required.
The energy needed for glucose synthesis is provided by ATP, which is an energy-rich molecule. In the Calvin cycle, the synthesis of one glucose molecule requires 18 molecules of ATP.
NADPH, a coenzyme involved in energy transfer reactions, is required for the reduction of carbon dioxide during the Calvin cycle. In the process, 12 molecules of NADPH are utilized to produce one molecule of glucose. These components play crucial roles in capturing and storing energy, as well as providing carbon atoms for the formation of glucose, which serves as a vital energy source for organisms.
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2. What is the frequency of an electromagnetic wave that has an energy of 9.89 x 10-18 J?
a. Known values:
b. Equation:
C. Work:
d. Answer:
The frequency of electromagnetic waves with an energy of 9.89×10-18 J is 1.492 ×10^16 Hz.
What are electromagnetic waves?
These are the waves created due to the vibration caused between two fields, i.e., electric field and magnetic field.
In simple words, it originates from the oscillating magnetic and electric field. The electromagnetic spectrum gives us a range of frequency, wavelength and Energies.
It is used to classify the electromagnetic waves and arrange them according to their order of frequencies and wavelength.
Frequency = Energy/ Planck's constant
f= E/h
h=6.626×10^-34 J s
⇒9.89×10^-18/6.626×10^-34
⇒1.492×10^16 Hz.
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When an electron in an unknown atom transitions from the n=3 to n=1 energy state, which statement correctly describes how the kinetic energy (KE), and potential energy (PE) of the excited electron changes in response to this transition to the n=1 energy state? KE decreases and PE increases KE decreases and PE decreases KE increases and PE increases KE increases and PE decreases
When an electron in an unknown atom transitions from the n=3 to n=1 energy state, the correct statement describing the change in kinetic energy (KE) and potential energy (PE) of the excited electron is:
KE increases and PE decreases.
As the electron transitions from a higher energy level (n=3) to a lower energy level (n=1), it moves closer to the nucleus. In the process, the electron loses potential energy because it is now in a more stable, lower energy state. Since potential energy decreases, kinetic energy must increase to conserve the total energy of the electron. Therefore, KE increases and PE decreases during this transition.
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Your answer should include all the following pieces of information. Check off each of the items you included in your answer. It contains 11 protons in the nucleus. It contains 12 neutrons in the nucleus. It contains 10 electrons surrounding the nucleus. The number of electrons are calculated from net charge and charge of proton (+1) and electron (–1). 12 neutrons are calculated from atomic number: 11 and mass number: 23.
The specie that we were asked to identify is the sodium ion.
What is the sodium atom?An atom is the smallest particle of a substance that can take part in a chemical reaction. Now we know that the atom is composed of the electrons, protons and neutrons.
In the sodium ion, there are 10 electrons, 11 protons and 12 neutrons. As such, the mass number of sodium is 23. It then follows that the specie that we were asked to identify is the sodium ion.
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CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)
Initial
Initial Concentration
Experiment
Massof CaCO3(s) (grams) of Haq) (M)
1
5.00
1.0
2
5.00
2.0
Initial Temperatureof
Reactants (°C)
25.0
25.0
The initial rate of formation of CO2(e) from the chemical reaction represented by the
equation above was studied in two separate experiments. The table above provides the
experimental conditions used. If both experiments are carried out with finely powdered
samples of the solid and 50.0mL of HCl(aq), which experiment, if any, will have the faster
initial rate of formation of CO2(g) and why?
The rate of formation of CO2(g) will be the same because the mass of CaCO3(s) and the volume of
HCl(aq) used will be the same in both experiments.
CO2(g) will be formed at a faster rate in experiment 2 because more H* particles can react per
unit time.
O CO26) will be formed at a faster rate in experiment 1 because the proportion of CaCO3(s)
particles to H* particles will be greater.
The rate of formation of CO2(e) will be the same because the surface area of the solid and the
average kinetic energy of the particles will be the same in both experiments.
Answer:CO2(g) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time
Explanation:
\(CO_2_{(g)}\) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time. The correct option is C.
What is a chemical reaction?A chemical reaction is a process that transforms one or more substances, known as reactants, to one or more different substances, known as products. Chemical elements or compounds are examples of substances.
Combination, decomposition, single-replacement, double-replacement, and combustion are the five basic types of chemical reactions.
Analyzing the reactants and products of a specific reaction will allow you to categorize it. Some reactions will fall into multiple categories.
If both experimental studies are carried out with finely powdered samples of the solid and 50.0mL of HCl (aq), then \(CO{_2_{(g)}\) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time.
Thus, the correct option is C.
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What is the Molarity of a Ca(OH)2 solution if 30.0mL of the solution is neutralized by 26.4mL of 0.25M HCI
solution?
Answer:
0.11M
Explanation:
What is the Molarity of a Ca(OH)2 solution if 30.0mL of
the solution is neutralized by 26.4mL of 0.25M HCI solution?
1L (1000 ml) of the HCl contains 0.25 moles of H ion
26.4 ml contains ( 26.4 X0.25/1000) moles of H ion ion
=0.0066 moles H ion
2HCl +Ca (OH)2-----> 2H2O +CaCl2
SO 2 H IONS NEUTRALIZE 1 Ca(OH)2 MOLECULE
00066 moles H ion neutralize 0.0033 moles Ca(OH)2
the 0.0033 moles are distributed over 30 ml, so the concentration of the
Ca(OH)2 IS 0,0033/(30/1000) =0.11 moles/liter or 0.11M
please someone explain this I dont get it at all. how do we know that the 4th electron came from 2p because it's at 4th ionisation? why is it talking about 3s?? how do overall know that aluminium is in group 3 from the table??? thanks
chemical drawing of PbBr3
In the compound lead(III) bromide (PbBr3), the lead atom (Pb) is surrounded by three bromine atoms (Br).
Each bromine atom forms a single covalent bond with the lead atom. This results in a trigonal planar molecular geometry, where the lead atom is at the center, and the three bromine atoms are evenly spaced around it.
To represent this structure textually, we can use a simplified format:
Br
|
Pb — Br
|
Br
In this representation, the Pb symbol represents the lead atom, and the Br symbols represent the bromine atoms. The lines between the symbols indicate the covalent bonds between the atoms.
It's important to note that in reality, lead bromide (PbBr3) tends to exist as a complex ionic compound rather than a discrete molecular structure. The compound forms a crystal lattice structure, where the lead atom carries a +3 charge and the bromine atoms carry a -1 charge. However, the simplified representation above helps convey the arrangement of atoms and bonds in the compound.
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PLS HELP NO LINKS PLS
Fill in the blank. One chlorine atom from one molecule of chlorofluorocarbon can destroy up to _____ ozone molecules.
100
100,000
10,000
50
Answer:
100,000 Ozone Molecules
Explanation:
I just found this online calculator that got the answer.
Answer:
100,000 is correct
Explanation:
Some of the glucose required for cellular respiration in humans is obtained by??
Answer:
.
Explanation:
Some of the glucose required for cellular respiration in humans is obtained by external food source which are rich in carbohydrates.
What is cellular respiration?Cellular respiration is the process in which cells combines the oxygen with the foodstuff molecules, and converting the chemical energy into life sustaining activities as energy.
In the human body, we get the glucose for the cellular respiration from the external food source which are riched in carbohydrates, starch, etc. After converting the chemical energy to glucose then oxygen is absorbed in the lungs and circulate the blood through out the body by red blood cells.
Hence, we get glucose from food source.
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Which energy transformations best describe a wildfire?
а
b
ОООО
Kinetic Energy -> Thermal Energy ->Chemical Potential Energy-> Light Energy
Chemical Potential Energy -> Thermal Energy -> Light Energy
Chemical Potential Energy -> Thermal Energy -> Light Energy -> Sound Energy
Thermal Energy -> Chemical Potential Energy->Light Energy -> Sound Energy
C с
Answer:
3
Explanation:
Identify the group number and generic outer electron configuration for a neutral main‑group element with the following two Lewis dot symbols.
X with 1 dot on the top, bottom and right
X with 1 dot on all sides
Answer: Answer to #1 is 3A and ns2np1
Answer to #2 is 4A and ns2np2
Explanation:Group number is the number of valance electrons and generic outer electron configuration has to add up to equal the number of valance electrons
The element in the first diagram is in group 13 while the element in the second diagram is in group 14.
The Lewis structure of an atom of an element is a representation of the number of valence electrons on the outermost shell of the atom of that element. Every group of elements have a generic electron configuration which represents the number of valence electrons contained by atoms of elements in that group.
In the first diagram, the element X belongs to group 3A(13) and has a generic outer electron configuration, ns2np1. In the second diagram, the element X is in group 4A(14) and has outer electron configuration ns2np2.
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WHAT IT IZ BRAINLY anyways I got a question for y’all do you think someone can forget who they rlly loved ? Can you ever forget who you really loved ? I’m tryna prove sum
Answer:
Its a 50% chance of it happeing
Explanation:
What was the purpose of using water/soap solution for one of the trials?
In one of the trials, the purpose of using water/soap solution was to compare the cleanliness of the hand with washing by water alone.
Hand washing is one of the simplest, most effective ways to avoid getting sick and prevent the spread of germs. Washing your hands with soap and water is still one of the most important steps you can take to avoid getting sick and to avoid spreading germs to others. The purpose of using water/soap solution for one of the trials was to compare the cleanliness of the hand with washing by water alone.The experiment involves two trials to investigate the effectiveness of soap and water in removing bacteria from hands. In one trial, the participant washed their hands with soap and water. While in the other trial, the participant washed their hands with water alone. After washing, their hands were pressed on a petri dish with culture medium to grow the bacteria. Then, the plates were placed in an incubator at 37°C for two days to grow bacteria. The soap and water solution are effective in removing bacteria from hands because the soap helps to lift dirt, grease, and microbes off skin and onto the surfaces of the lather, so that it can be rinsed away by water.
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Find the mass of a block of ice that has the dimensions of 5cm height, 6cm long, and 10cm in width and a density of 30 grams / c m~3
The mass of a block of ice that has the dimensions of 5cm height, 6cm long, and 10cm in width and a density of 30 grams / c m³ is 9000 g.
given that :
density = 30 g/ cm³
height of block = 5cm
length of block = 6cm
width of block = 10 cm
volume of the block is calculated by the following formula :
volume = length × width × height
volume = 6 cm × 10 cm × 5 cm
volume = 300 cm³
now, the density of the block is given by :
Density = mass / volume
mass = Density × volume
mass = 30 g/ cm³ × 300 cm³
mass = 9000 g
Thus, The mass of a block of ice that has the dimensions of 5cm height, 6cm long, and 10cm in width and a density of 30 grams / c m³ is 9000 g.
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Which of the following are typical of healthy water Water temperatures <86
∘
F for warm-water fisheries and <68
∘
F for cold-water fisheries Dissolved oxygen >5mg/L pH between 6 and 9 Streams should be "free from" sediments
These characteristics serve as guidelines for assessing the health and quality of aquatic environments, supporting the well-being of fish and other aquatic organisms.
Water temperatures below 86°F (30°C) for warm-water fisheries and below 68°F (20°C) for cold-water fisheries: Different fish species have different temperature preferences for optimal growth and survival. Warm-water fisheries generally thrive in higher water temperatures, while cold-water fisheries prefer cooler temperatures. Water temperatures outside these ranges can stress fish and disrupt their natural habitat.
Dissolved oxygen levels above 5 mg/L: Oxygen is essential for aquatic organisms, including fish, to breathe and carry out their metabolic processes. Adequate dissolved oxygen levels are necessary to support healthy aquatic ecosystems. Oxygen can enter the water through aeration from the atmosphere, photosynthesis by aquatic plants, and mixing with flowing water.
pH between 6 and 9: pH is a measure of the acidity or alkalinity of water. Most aquatic organisms, including fish, have adapted to function within a specific pH range. A pH between 6 and 9 is generally considered suitable for supporting diverse aquatic life. Extreme pH levels outside this range can be detrimental to aquatic organisms.
Streams should be "free from" sediments: Excessive sedimentation in streams can negatively impact aquatic ecosystems. Sediments can smother fish eggs, suffocate benthic organisms, and reduce water clarity, which affects photosynthesis and the availability of food sources. Healthy streams have a natural balance where sediment inputs are minimal, allowing for clear water conditions.
These characteristics serve as guidelines for assessing the health and quality of aquatic environments, supporting the well-being of fish and other aquatic organisms. However, it's important to note that specific water quality requirements may vary for different species and ecosystems.
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Which of the following is NOT a property of metals associated with metallic bonds?
what are the following things
Metals are good conductors and shows some peculiarities such as luster, ductility, malleability,etc. Brittleness is not associated with metals since they are hard. Hence option A is correct.
What is metal?Metals are electropositive elements with good conductivity. Metals are classified into the s block and d block of periodic table. Thus alkali metals, alkaline earth metals and transition metals are the classes of metals.
Metals are rich in free electrons thereby, they capable of conducting electrically and thermally. Other features that metals have , they are hard and not brittle. Metals are malleable and ductile.
Malleability is the property by which it can be pressed into different shapes easily without cracking. Ductility means they can be plastically deformed into thin wires without fracture.
Metals are shining and this property is called lustrous. Hence all the properties such malleability, ductility and luster are features of metals but they are not brittle. Hence option A is correct.
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Your question is incomplete. But your complete question probably was:
Which of the following is NOT a property of metals associated with metallic bonds?
A Brittleness
B Malleability
C Ductility
D Luster
such as a cow, has offspring, what characteristic will the offspring most likely inherit?
A Body shape and behavoir
B Hair or fur and number of legs
C Number of legs and scales
D Skin color and body segments
0.3747x + 11.598 pls help meeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
that isn't a full equation but I will assume this is = to 0
that makes x 30.95
Explanation:
Calculate the number of C70 molecules that can be made from one mole of
carbon atoms.
The Avogadro constant = 6.02 × 1023 per mole
[3
The third and last allotropic form of carbon, following diamond and graphite, is C70 fullerene. The name C70 fullerene refers to the fullerene molecule with 70 carbon atoms.
Let's think about the molecule of carbon dioxide. Since we are aware of its chemical formula, CO2, we can infer that each mole of carbon dioxide comprises 6.02 x 1023 molecules.
The Avogadro's constant is a factor that's used to estimate how many particles are present in a specific substance.
The expression for Avogadro's constant in scientific notation is:
6.02214076×10²³ mol⁻¹.
The amount of particles in 1 mole of a substance is determined by Avogadro's constant, a proportionality factor.
It is comparable to 602,252,000,000,000,000,000,000,000 in ordinary units.
In this way, the avogadro constant can be written as 6.022140761023 mol 1 or 602,252,000,000,000,000,000.
One mole of carbon and two moles of oxygen make up one mole of CO2, or 6.023 x 1023 C atoms and 12.04 x 1023 O atoms, respectively. Avogadro's number, which equals 6.023 x 1023, indicates how many atoms or molecules are contained in one mole of a substance. 6.023 x 1023 CO2 molecules make up one mole of carbon dioxide.
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a. calculate the molarity and normality of a 140.0 mg/l solution of h2so4; find the concentration of the same solution in units of ""mg/l as caco3"".
1 L of the acid solution contains 142.85 mg of CaCO3.
Given, mass of H2SO4 = 140 mg / L
The molecular weight of H2SO4 = 98g / mol
Molarity = mass of H2SO4 / molecular weight of H2SO4 = 140/98 = 1.4285
Normality = Molarity x n factor n factor for H2SO4 = 2Molarity = 1.4285
Normality = 2 x 1.4285 = 2.857 mg / mL1 mol of H2SO4 = 98 g
Hence, 1 ml of H2SO4 = 98/1000 = 0.098gCaCO3 has a molecular weight of 100 g. Therefore, 1 mole of CaCO3 has a mass of 100 g. According to this, 1 mole of CaCO3 reacts with 2 moles of H2SO4.
The normality of the acid is 2.857.
Hence, 1 L of the acid will have 2.857 moles of H2SO4.To calculate the concentration in mg/L of the acid in terms of CaCO3, we need to first find the number of moles of CaCO3 that can be reacted with 2.857 moles of H2SO4.2 moles of H2SO4 react with 1 mole of CaCO3.Therefore, 2.857 moles of H2SO4 will react with:
1 mole of CaCO3/2 moles of H2SO4 = 1.4285 moles of CaCO3In 1 L of the acid, there are 1.4285 moles of CaCO3.The mass of 1.4285 moles of CaCO3 = 1.4285 x 100 = 142.85 g / L
Therefore, 1 L of the acid solution contains 142.85 mg of CaCO3.
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