Answers
Answer:
hence the correct answer is 52.94 or 53g H2O approx.
Related Questions
An electrolysis reaction is
A) spontaneous
B) exothermic
C) non-spontaneous
D) hydrophobic
Answers
Answer:
it's non-spontaneous
Explanation:
I hope it helps you
What is the relationship between the degree of ionization and conductivity?
A. The lower the degree of ionization, the stronger the conductivity.
B. The higher the degree of ionization, the stronger the conductivity.
C. Conductivity is directly proportional to the degree of ionization.
D. Conductivity is inversely proportional to the degree of ionization.
Answers
Answer:
B
Explanation:
Part B
Next, you’ll test your hypothesis from part A by examining the reaction times of vinegar and baking soda in water at four different temperatures. You’ll carry out the reaction using water at room temperature (about 25°C), 40°C, 60°C, and 80°C. Make sure that you use the same amounts of vinegar and baking soda for all three three trials.
Gather all the materials, and perform these steps for each trial:
Heat at least
cup (60 milliliters) of water to the required temperature (refer to the data table). Water may be heated on a stove, on a hot plate, or in a microwave oven.
Measure and record the actual temperature of the water.
Measure 1 tablespoon (15 milliliters) of the water into the cup.
Add
teaspoon (1.5 grams) baking soda to the water, and stir until it is dissolved. The solution will be clear.
Measure 1 tablespoon (15 milliliters) of vinegar, but do not pour it into the cup yet.
Very quickly, do all of the following:
a. Pour the measured vinegar into the cup.
b. Start the stopwatch.
c. Stir or carefully swirl the substances in the cup.
The chemical reaction will produce bubbles. You’ll be able to see the bubbles and hear them pop. Watch and listen for when the reaction stops. When it looks and sounds like it has finished, stop the stopwatch.
Record the reaction time in the data table.
Discard the solution down the drain, and rinse the cup.
Repeat steps 1–9 of this procedure, doing three trials for each water temperature. Record the average temperature and reaction time for each set of the three trials. Read this math review to know how to calculate average of a data set.
Answers
The reaction time decreases as the temperature increases of the reaction mixture increases.
A sample record of results is:
Temperature (°C) Trial 1 Trial 2 Trial 3 Average25°C 11 seconds 11 seconds 11 seconds 11 seconds40°C 8 seconds 8 seconds 8 seconds 8 seconds60°C 5 seconds 5 seconds 5 seconds 5 seconds80°C 3 seconds 3 seconds 3 seconds 3 secondsWhat is the effect of an increase in temperature on reaction time?An increase in temperature leads to an increase in reaction rate or a decrease in reaction time.
The increase in temperature provides more thermal energy to the reactant molecules, which leads to an increase in the average kinetic energy of the molecules. As a result, more reactant molecules have sufficient energy to overcome the activation energy barrier and undergo successful collisions, leading to an increased reaction rate.
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Sodium hydroxide (0.400 mol) is allowed to react with an excess of sulfuric acid. How many moles of
sodium sulfate could be recovered from the products?
NaOH + H2SO4 → Na2SO4 + H20
Answers
Answer:
2 moles
Explanation:
In this reaction, the stoichiometry (mole ratio) is 1 mole of sulfuric acid reacting with 2 moles of sodium hydroxide (1:2 ratio)
9.48 Use bond energies to calculate the enthalpy of reaction:
Answers
ΔH(reaction) = sum of the bond energies of bonds being broken - sum of the bond energies of the bonds being formed.
What does "bond energy" mean?
The amount of energy required to separate the atoms forming a molecular bond into free atoms is known as bond energy, and it serves as a gauge of the strength of a chemical connectionWhat does a high bond energy mean?
The amount of power needed to rupture a covalent link between two atoms is known as bond energy. If a bond has a high bond energy, it is likely to be strong, and the molecule it is in will likely be stable and less reactive. Bonds in more reactive substances will often have lower bond energies.To know more about bond energy checkout this link:
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Provide the rough work for each molecule listed, as shown in the examples(skip copper (II) nitrite, niobium (V) phosphate and triphosphorus monoxide, as the chemical formula provided doesn't match the names).
Answers
The question provides a list of chemical formulas and their respective names and requests us to show the "rought work" - the calculations with the oxidation state for each element in the molecule.
To calculate the charge of the elements in a molecule, we need to keep in mind that some species have a determined number of oxidation that only changes in very specific occasions. Also, it is important to remember that the charge of the entire molecule must be considered - in this case, all molecules are neutral (charge = 0). At last, we always need to consider the number of atoms of each element in the molecule to calculate the total charge.
For, KClO3, we start from K and O, which have +1 and -2 charges, respectively:
K: 1 * +1 = +1
O: 3 * -2 = -6
To achieve total charge = 0: -6 + 1 = +5
Thus, N: 1 * +5 = +5
For NH4Cl, we start from Cl and H, which have -1 and +1 charges, respectively:
Cl: 1 * -1 = -1
H: 4 * +1 = +4
To achieve total charge=0 we need to balance +4 - 1 = +3.
Thus, N: 1 * -3 = -3
For AuI3, the name states that gold has +3 charge (Au III). We could also start from I, which has charge 1:
I: 3 * -1 = -3
Au: 1 * +3 = +3
For NiF2, the name also says that Ni has a charge (+2), but we could also calculate it from the charge of F, which is -1:
F: 2 * -1 = -2
Ni: 1 * +2 = +2
For N2Br4, we can start from Br, which has charge -1:
Br: 4 * -1 = -4
N: 2 * +2 = +4
To achieve total charge = 0, we need that the charge of all atoms of N be equal to +4.
Thus: charge of N: +4/2 = +2
For Li2CrO4, we can start from the charge of O (-2) and Li (+1):
O: 4 * -2 = -8
Li: 2 * +1 = +2
To achieve total charge = 0, we need that Cr has charge = -8 + 2 = +6
Cr: 1 * +6 = +6
For (NH4)2CO3, we can start from O (-2), C (+4) and H (+1). Remember that, in this case, we also need to consider the number outside the parenthesis!
O: 3 * -2 = -6
C: 1 * +4 = +4
H: 4*2 * +1 = +8
Thus, to achieve total charge = 0, we need that the total charge of N atoms to balance -6+8+4
Then, we calculate: (charge of each N atom): N = -6 / 2 = -3
N: 1*2 * -3 = -6
The rate at which the plates move apart ______
Answers
Answer:
one to two inches (three to five centimeters) per year.
Explanation:
Answer:
1 to 2 inches (3 to 5 centimeters) per year
Explanation:
It depends on what plates your talking about, but in general, they move apart anywhere from 1 to 2 inches (3 to 5 centimeters) per year.
Specifically, though, The Arctic Ridge has the slowest rate (less than 2.5 cm/yr), and the East Pacific Rise near Easter Island, in the South Pacific about 3,400 km west of Chile, has the fastest rate (more than 15 cm/yr).
Two methods by which we can conserve water and water the plants.
Answers
Answer:
Two methods which help us to conserve water are:
Sprinkler irrigation system: this irrigation has an arrangement of vertical pipes with rotating nozzles on the top. It is more useful in the uneven and sandy land where sufficient water is not available.
Drip irrigation system: this irrigation system has an arrangement of pipes or tubes with very small holes in them to water plants drop by drop just at the base of the root. It is very efficient as water is not wasted at all.
Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number. (3 points)
1.
Se
2.
S
3.
Sn
a.
Tin
b.
78.971 u (atomic mass)
c.
16 (atomic number)
Answers
Answer:
Tin I thunk
Explanation:
I think
Answer:
sn = tin
se = 78.971 u (atomic mass)
s = 16 (atomic number)
How many moles of KF are contained in 180.0 mL of a 0.250 M solution?
Answers
Answer:
To calculate the number of moles of KF in a solution, we can use the formula:
moles = concentration x volume
where concentration is in units of moles per liter (M), and volume is in liters (L).
First, we need to convert the volume from milliliters (mL) to liters (L):
180.0 mL = 0.1800 L
Next, we can plug in the values we have:
moles = 0.250 M x 0.1800 L = 0.0450 moles
Therefore, there are 0.0450 moles of KF in 180.0 mL of a 0.250 M solution.
Explanation:
Process by which plants, algae, and many types of bacteria use sunlight, water, and carbon dioxide to make food and oxygen
Answers
Answer: Photosynthesis
Explanation:
The process of photosynthesis is used to help make food for plants. The inputs are sunlight, water (H2O), and carbon dioxide (CO2). Then the outputs are glucose (C6H12O6) which is food, and oxygen (O2) is released.
I hope this helps :)
Question 4 of 10
What form of the ideal gas law would you use to calculate the temperature of
a gas?
O A. Ta
B. Y =
C. P = nRT
D. n =
RT
Answers
Answer:
C. P = nRT
Explanation:
PV = nRT, where n is a number of moles and R is the universal gas constant, R = 8.31 J/mol ⋅ K.
Hope this helps :)
Answer:T =PV/nR
Explanation:
Determine the total kilojoules in two tablespoons
Answers
The total kilojoules in two tablespoons is 836.8 kJ.
To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.
The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.
For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:
100 kcal * 4.184 kJ/kcal = 418.4 kJ
So, if we have two tablespoons of this substance, the total energy would be:
418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ
It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.
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categorize the pairs of variables given below as directly or inversely proportional for an ideal gas. for each pair, assume all other variables are held constant.
Answers
Directly inversely correlated are the following quantities: pressure and absolute temperature, volume and moles, volume and absolute temperature, and density and molar mass. Volume and pressure are inversely correlated.
In chemistry, what exactly is a molar mass?A substance's molar mass is defined as its molecular weight in grams. By adding the molar masses of a substance's constituent atoms, as demonstrated in this video, we may get the substance's molar mass. Then, to convert between mass and the quantity of moles of the material, we may utilize the computed molar mass.
What else do you call molar mass?The sum of all the atoms' individual masses in grams that make up a mole of a certain molecule is known as the molar mass, sometimes referred to as molecular weight.
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Granite is part of the crust layer of the earth.
True
False
Answers
Answer:
That would be True
Explanation:
granite is a part of the crust layer.
What volume of CO2(g), measured at STP is produced if 15.2 grams of CaCO(s) is heated?
Answers
Answer:
Volume = 3.4 L
Explanation:
In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:
CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)
Now, let's calculate the number of moles in 15.2 g CaCO₃:
mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)
= \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)
= 0.1518 moles
From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.
Hence, from the formula for the number of moles of a gas, we can calculate the volume of CO₂:
mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)
⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)
⇒ Volume = 0.1518 × 22.4
= 3.4 L
Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.
Thermal Energy and Kinetic Molecular Theory Quick Check
Answers
The Kinetic Molecular Theory is a scientific model that states atoms in a compound are found in a constant state of motion (movement).
What is the Kinetic Molecular Theory?The Kinetic Molecular Theory is a scientific model that states atoms in a compound are found in a constant state of motion (movement).
Thermal energy refers to the movement of particles and therefore both concepts are interrelated.
In conclusion, the Kinetic Molecular Theory is a scientific model that states atoms in a compound are found in a constant state of motion (movement).
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The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is ________ J. The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is ________ J. 0.950 145 113 1450 113000
Answers
The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is 113.30 J. Option D
The kinetic energy of an object can be calculated using the formula: KE = (1/2)mv^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity or speed of the object.
Given:
Mass (m) = 23.2 g = 0.0232 kg
Speed (v) = 98.7 m/s
Substituting these values into the formula, we can calculate the kinetic energy:
KE = (1/2)(0.0232 kg)(98.7 m/s)^2
KE = (1/2)(0.0232 kg)(9756.09 m^2/s^2)
KE ≈ 113.30 J
Therefore, the kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is approximately 113.30 J.
It's worth noting that the question is repeated twice, but the answer remains the same. The kinetic energy of the object is determined by its mass and speed, and both calculations yield the same result. Option D
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In the NCl3 molecules there are banded pairs of electrons and nonbonded pairs of electrons attached to central atom?
Answers
Answer: the anwser is a. cuz i did it so im smart and u should listen to me
Explanation:non>
Which particle has the same mass as a neutron?
Answers
Answer:
proton
Explanation:
neutron: A subatomic particle forming part of the nucleus of an atom. It has no charge. It is equal in mass to a proton or it weighs 1 amu.
Answer:
protons
Explanation:
approximately the same mass
100 points!
Why rusting is a chemical change?
1-A new reactant is formed
2-A new product is formed
3-There is increased activation energy
4-A new substance is not formed
Answers
Answer: 4
Explanation:
The video is Continental Drift By- Mike
Answers
Answer:
Hahah
Explanation:hahah
Help can someone do this for me
Answers
Answer:
Magnesium Mg 12 12
Phosphorous P 15 15
Flourine F 9 9
Iron Fe 26 26
Calcium Ca 20 20
Flourine F 9 9
Explanation:
Answer:
Magnesium Mg 12 12
Phosphorous P 15 15
Fluorine F 9 9
Iron Fe 26 26
Calcium Ca 20 20
Fluorine F 9 9
Besides the major types of radioactive decay, there are two others: positron emission and electron capture.
1. Compare and contrast positrons with electrons.
2.Explain how positron emission works and how it causes transmutations.
3. Explain how electron capture works and how it causes transmutations.
4. Compare the transmutations caused by positron emissions and electron capture.
Answers
positron emission and electron capture both occur in specific radioactive decays and are associated with unstable nuclei. They play a crucial role in balancing the ratio of protons to neutrons in a nucleus, leading to more stable configurations.
Positrons and electrons are both subatomic particles with opposite charges. Positrons have a positive charge (+1), while electrons have a negative charge (-1). They have the same mass, which is approximately 9.1 x 10^-31 kilograms.
However, positrons and electrons differ in their origins. Positrons are the antiparticles of electrons, meaning they have the same mass but opposite charge. Positrons are typically produced in certain radioactive decays, while electrons are ubiquitous in atoms and play a fundamental role in chemical reactions.
Positron emission occurs when a proton inside an unstable nucleus is converted into a neutron, releasing a positron and a neutrino. This process reduces the atomic number by one while maintaining the mass number. The positron is ejected from the nucleus, carrying away the positive charge.
The positron can cause transmutations by colliding with an electron in the vicinity. The collision results in the annihilation of both particles, converting their masses into energy in the form of gamma rays. This annihilation process contributes to medical imaging techniques like PET scans.
Electron capture happens when an unstable nucleus captures an electron from its electron cloud. The captured electron combines with a proton in the nucleus, resulting in the formation of a neutron and a neutrino. This process also reduces the atomic number by one while preserving the mass number.
Electron capture causes transmutations by changing the composition of the nucleus. By capturing an electron, the number of protons decreases, transforming the element into another one with a lower atomic number.
Positron emissions and electron capture both result in the reduction of atomic number by one. However, positron emission involves the release of a positron from the nucleus, while electron capture involves the capture of an electron by the nucleus. The overall effect is the same—a decrease in atomic number.
Furthermore, positron emission and electron capture both occur in specific radioactive decays and are associated with unstable nuclei. They play a crucial role in balancing the ratio of protons to neutrons in a nucleus, leading to more stable configurations.
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Question 2
A proton and an electron move further apart from each other. Does the electrostatic
potential energy associated with their interaction increase or decrease?
O Increase
O Decrease
Answers
Answer:
decrease
Explanation:
because they're not the same
7. What are the coefficients that will balance the skeleton equation below?
N₂ + H₂ → NH3
a.1,1,2
b.3,1,3,1
c.1,1,1,3
d.1,3,3,1
When the equation Fe + Cl₂ → FeCl, is balanced, what is the coefficient
Answers
Answer:
N₂ + 3H₂ → 2NH3
4Fe + 2Cl₂ → 4FeCl
Explanation:
This equations are now balanced
pls rate as brainliest
the temperature of container a (298K at 1atm) is lowered to 100k. which of the following will not occur to the gas in the same container? assume the container is rigid
Answers
Answer:
the pressure of the gas in container A will remain constant as the temperature is lowered
Explanation:
To answer the question, we need to consider the gas laws and how they relate to changes in temperature, pressure, and volume of a gas.
Based on the information given, we know that the temperature of the gas in container A is being lowered from 298 K to 100 K, while the container is kept rigid, meaning its volume cannot change.
The gas law that applies to this scenario is Charles's Law, which states that at constant pressure, the volume of a gas is directly proportional to its temperature. Since the volume is constant in this case, we can conclude that the pressure of the gas must also remain constant.
Therefore, the answer to the question is: the pressure of the gas in container A will not change.
The following changes will occur to the gas in container A as the temperature is lowered from 298 K to 100 K:
The average kinetic energy of the gas particles will decrease.The gas particles will move more slowly and have less momentum.The frequency of the gas particle collisions with the container walls will decrease, leading to a decrease in the force exerted by the gas on the container walls.The density of the gas will increase (assuming the number of gas particles remains constant), since the same number of particles will be occupying a smaller volume due to the decrease in temperature.In summary, the pressure of the gas in container A will remain constant as the temperature is lowered, while the other properties of the gas will change.
1. Consider the following mechanism. [4 Marks]
03 O2 + 0 (fast)
03+0202 (slow)
(a) Write the overall balanced chemical equation.
(b) Identify any intermediates within the mechanism.
(c) What is the order with respect to each reactant?
(d) Write the rate law for the overall reaction.
Answers
Consider the following mechanism.
The overall balanced chemical equation : 2O₃ ----> 3O₂
The intermediates within the mechanism : O
The order with respect to each reactant : 2
The rate law for the overall reaction : R = k[O₃]²/[O]
The equations are :
O₃ ----> O₂ + O fast
O₃ + O ---> 2O₃ slow
a) The overall reaction is given as :
2O₃ ----> 3O₂
b) The intermediates within the mechanism is O.
c) The order with respect to each reactant is 2
d) slow step rate : k[O][O₃]
at equilibrium, kc = [O][O₂] / [O₃]
The rate law = R = k[O₃]²/[O]
Thus, Consider the following mechanism.
The overall balanced chemical equation : 2O₃ ----> 3O₂
The intermediates within the mechanism : O
The order with respect to each reactant : 2
The rate law expression for the reaction : R = k[O₃]²/[O]
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Why is it important to recognize the physical properties of the reactants in the chemical reaction that you will model in your culminating event project?
Answers
Chemical Changes
Chemical changes take place at the molecular level. A chemical change produces a new substance. Another way to think of it is that a chemical change accompanies a chemical reaction. Examples of chemical changes include combustion (burning), cooking an egg, rusting of an iron pan, and mixing hydrochloric acid and sodium hydroxide to make salt and water.
Physical Changes
Physical changes are concerned with energy and states of matter. A physical change does not produce a new substance, although the starting and ending materials may look very different from each other. Changes in state or phase (melting, freezing, vaporization, condensation, sublimation) are physical changes. Examples of physical changes include crushing a can, melting an ice cube, and breaking a bottle.
How to Tell Chemical & Physical Changes Apart
A chemical change makes a substance that wasn't there before. There may be clues that a chemical reaction took places, such as light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same, even though they may look different.
hope this helps
5 star and brainliest?
PLSSSSS HELLP
ASAPPPPPP: When you evaluate a website, you are looking to make sure a website is
ruthful. Which item does not indicate a truthful website?
Opublisher or author
Ofactual information
Orecent date of creation or revision
Oopinion
Answers
Answer:
Opinion does not indicate a truthful website. When evaluating a website, you should look for indications of accuracy, such as the publisher or author, the actual information provided, and the recent date of creation or revision. Opinion does not provide any indication of the accuracy of the website.
Explanation: