The balanced equation states that for every 6 moles of HNO3 consumed, 2 moles of H2O are produced.
In this case, we are given that 96.00 moles of HNO3 are consumed in the reaction. To find the number of moles of H2O produced, we can use the stoichiometry of the balanced equation. We know that for every 6 moles of HNO3 consumed, 2 moles of H2O are produced. Therefore, we can use the proportion: 2 moles H2O/ 6 moles HNO3 = x moles H2O / 96.00 moles HNO3. Solving for x gives: x = (2 * 96.00) / 6 = 16 moles of H2O are produced when 96.00 moles of HNO3 are consumed. It's important to note that the balanced equation provides the stoichiometry of the reaction which helps us to calculate the number of moles of product produced from the given number of moles of reactant. The balanced equation also tells us that the reaction is stoichiometrically balanced and the number of moles of reactant and product are in a defined ratio.
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Pls help:)! Describe the steps you would take to write the chemical formula for the compound iodine trioxide
Answer:
IO3(.) (IO3)(.) Iodine trioxide is an iodine oxide and an inorganic radical.
Explanation:
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The Rank of the diseases in order by number of deaths are:
Heart disease: 647,457 deaths per yearCancer: 599,108 deaths per yearChronic lower respiratory diseases: 160,201 deaths per yearStroke (cerebrovascular diseases): 146,383 deaths per yearAlzheimer’s disease: 121,404 deaths per year.What is the disease about?Heart disease and cancer are the leading causes of death globally, with heart disease causing the most deaths each year. Heart disease can refer to a variety of conditions that affect the heart, such as coronary artery disease, heart failure, and hypertension. These conditions can be caused by a variety of factors, including genetics, lifestyle choices, and certain medical conditions.
Note that Cancer is a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body. There are many different types of cancer, each with its own causes and risk factors. Some common types of cancer include lung cancer, breast cancer, and colon cancer.
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3.your body contains vast numbers of carbon atoms. how is it possible that some of these carbons may have been part of the body of a prehistoric creature?
The Carbon is reused through carbon cycle. There is a carbon in oil, which is made of the prehistoric creatures. which is made of the ancient animals, and this carbon is then discharged into the air during ignition.
Our body contains vast numbers of the carbon atoms. These carbons have been the part of the body of prehistoric creature. which is made of the ancient animals. This carbon is then discharged into the air during ignition. Carbon is then taken by the plants as CO₂, carbon dioxide, which we then eat.
The Carbon particles of the body used to be the piece of the body of a prehistoric creature, as chemical components is utilized and then reused by the living animals.
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What is the mass of a water sample which absorbs 1450 J of energy when its temperature increases by 6.5 °C?
According to specific heat capacity, the mass of a water sample which absorbs 1450 J of energy when its temperature increases by 6.5 °C is 53.11 g.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔt , on substitution of values m=1450/4.2×6.5=53.11 g.
Thus, the mass of a water sample which absorbs 1450 J of energy when its temperature increases by 6.5 °C is 53.11 g.
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what would be the best technique for mixing a nice medium range color such as a medium green, one that is midway between blue and yellow?
The best technique for mixing color to create a nice medium green color is to mix equal parts of blue and yellow paint.
When mixing colors, it is important to understand the color wheel and the primary colors. The primary colors are red, blue, and yellow. By mixing two primary colors together, you can create the secondary colors.
In this case, if you mix blue and yellow paint together, you will create a medium green color. However, you should experiment with the ratios of blue and yellow paint until you achieve the desired shade of green. Additionally, you can also add small amounts of other colors such as white or black to adjust the value and saturation of the green color.
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the building block of all elements and the smallest component into which an element can be divided is called ?
The building block of all elements and the smallest component into which an element can be divided is called an atom. An atom is the fundamental unit of matter that makes up all elements. It is composed of a nucleus, which contains protons and neutrons, and electrons, which orbit around the nucleus. The number of protons in an atom's nucleus determines what element the atom belongs to.
glucose indicator was added to a beaker of an unknown liquid. starch indicator was added to a different beaker containing the same unknown liquid. the color of the indicator solution before they were added to the beakers and the color of the contents of the beakers after adding the indicator solution are recorded in the chart below. which carbohydrate is present in the unknown liquid and why?
The mixture in beaker 2. changed color due to the presence of starch in the unknown liquid.
How does organic chemistry define glucose?A e-9, glucose is a form of carbohydrate. It is made from carbon, hydrogen, & oxygen atoms. Due to the presence of carbon atoms, fructose is an organic substance.
What really is glucose and what does it do?Blood sugar, often known as glucose, is the main sugar found in your blood. It comes from the food we eat and is used as your body's main source of energy. Your blood supplies glucose to all the tissues in your body, which then uses it as fuel. Diabetes is a disorder when your glucose levels levels are too high.
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Rank the following compounds in order of decreasing vapor pressure. rank from highest to lowest vapor pressure. to rank items as equivalent, overlap them. CH3CH2CH2CH2CH3
CH4
CH3CH-CH3CH2CH3
CH3CH2CH2OH
Among the compounds listed, CH4 has the highest vapor pressure, followed by CH3CH-CH3CH2CH3, CH3CH2CH2CH2CH3, and CH3CH2CH2OH.
The vapor pressure of a substance is determined by the strength of the intermolecular forces between its molecules. In general, the more volatile a substance is, the higher its vapor pressure. The compounds listed above are all organic compounds, and their relative volatility can be determined by comparing the strength of the intermolecular forces between their molecules.
This ranking is based on the fact that CH4 is a simple alkane compound with only London dispersion forces between its molecules. The other compounds have London dispersion forces and dipole-dipole interactions which are weaker than London dispersion forces in CH4. Hence CH4 will have the highest vapor pressure among the given compounds.
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If zinc replaces iron, iron replaces lead, and zinc replaces lead in a chemical reaction, the order of activity from most active to least active is _____.
zinc, iron, lead. If zinc replaces iron, iron replaces lead, and zinc replaces lead in a chemical reaction, the order of activity from most active to least active is zinc, iron, lead.
Even though the body only requires minute quantities of zinc, almost 100 enzymes depend on it to perform essential chemical processes. It plays a crucial role in the production of DNA, cell proliferation, the synthesis of proteins, the repair of damaged tissue, and the maintenance of a strong immune system. With the atomic number 30 and the symbol Zn, zinc is a chemical element. When the oxidation is eliminated, zinc transforms into a shiny-greyish metal that is slightly brittle at normal temperature. It is the first element in the table's group 12 of elements.With the atomic number 30 and the symbol Zn, zinc is a chemical element. When the oxidation is eliminated, zinc transforms into a shiny-greyish metal.
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which of the following statements about the equilibrium is false? a) if the system is heated, the right side is favored. b) this is a heterogeneous equilibrium. c) if the pressure on the system is increased by changing the volume, the left side is favored. d) adding more h2(g) increases the equilibrium constant. e) removing hi as it forms forces the equilibrium to the right.
The false statement is that adding more H2(g) rises the equilibrium constant.
In chemistry, how would you find equilibrium?Q can be utilized to predict which way a response will shift to achieve equilibrium. If K > Q, the reaction will continue, converting reagents into products. If K Q, the reaction will go in the opposite direction, converting products back into reactants. If Q = K, the system has already reached equilibrium.
What is the most perfect example of equilibrium?Here are some examples of equilibrium: A book resting on a table. A car moving at a constant speed. A chemical reaction in which the prices of forward and reverse reactions are the same.
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The complete question is-
Consider: H2(g)+I2(s)=2HI(g)
Which of the following statements about the equilibrium is false?
A. If the system is heated, the right side is favored
B. This is a heterogeneous equilibrium
C. If the pressure on the system is increased by changing the volume, the left side is favored
D. Adding more H2(g) increases the equilibrium constant
E. Removing HI as it forms forces the equilibrium to the right
why is it more effective to perform an extraction with several small portions of solvent as opposed to one large portion of solvent of equal volume? byu
It is more effective to perform an extraction with several small portions of solvent as opposed to one large portion of solvent of equal volume because the amount of the material left in the trash will be less.
The extraction of certain ratio of the solute is able to the distribute among the phases during each extraction. The various extractions with the lesser amounts of the solvent are more efficient than the single extraction with the huge amount of solvent.
The extraction is about to maximize the outside field of the communication between the two solvents, we can easily get the more surface area in the contact with the fewer amounts.
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mandelate esters exhibit spasmolytic activity (they act as muscle relaxants). the nature of the alkyl group (r) greatly affects potency. research indicates that the optimal potency is achieved when r is a nine-carbon chain (a nonyl group). explain why nonyl mandelate is more potent than both octyl mandelate and decyl mandelate
Because they are non-polar, alkyl groups reduce a molecule's solubility in water. As a result, the nonyl group increases the molecule's solubility in water and enhances its ability to penetrate cell membranes.
How many different alkyl groups exist?There are thus four C4H9- alkyl groups that are isomeric. A similar IUPAC process to that was employed to name alkanes is used to name alkyl groups, only with longest continuous sequence beginning somewhere at branch point. The methyl group of CH3 is the lowest alkyl group.
What number of alkyl are there?Methane and ethane only produce one type of alkyl group. However, depending around which nucleophile "loses" a hydrogen ions, many isomeric carboxyl group are typically feasible for a continuous chain of carbon atoms.
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(d) does the value of kc increase, decrease, or remain the same when the temperature is decreased? justify your answer based on the expression for kc and the concentrations of the product and reactants.
The value of kc increases when the temperature is decreased and thereby the reaction to shifts to the right. decreasing the concentration of reactants and increasing products.
What is the equilibrium constant of concentration?The equilibrium constant of concentration is a mathematical expression that describes the relationship between the concentrations of reactants and products at equilibrium in a chemical reaction. It is usually written as Kc or Kp.
Therefore, with this data, we can see that the equilibrium constant of concentration increases when temperature drops and thus decrease the reactant levels and increases the products.
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1. (20 points) the following data are available for liquid carbon tetrachloride vapor pressure (bar) 0.165077 0.369912 t (k) 300.0 320.0 0.742811 340.0 (a) (10 points) compute the heat of vaporization of carbon tetrachloride at 310 k using only these data. (b) (10 points) compute the heat of vaporization of carbon tetrachloride at 310 k using the srk equation of state.
The heat of vaporization of carbon tetrachloride at 310 k is ΔHvap ≈ 42.79 kJ/mol.
(a) Computing heat of vaporization using vapor pressure data:
Heat of vaporization can be calculated using the Clausius-Clapeyron equation, which relates the vapor pressure and temperature of a substance to its heat of vaporization. The equation is given as:
dP/dt = ΔHvap/RT^2
Where ΔHvap is the heat of vaporization, R is the gas constant, T is the temperature and P is the vapor pressure. We can rearrange the equation to obtain ΔHvap:
ΔHvap = R * (dP/dt) * T^2 / (T2 - T1)
Using the data given, we can estimate dP/dt by taking the slope between the two points closest to 310 K:
dP/dt = (0.369912 - 0.165077) / (320.0 - 300.0) = 0.102175
Substituting the values into the equation for ΔHvap, we obtain:
ΔHvap = 8.314 * 0.102175 * (310)^2 / (320 - 300)
ΔHvap ≈ 42.79 kJ/mol
(b) Computing heat of vaporization using SRK equation of state:
Heat of vaporization can also be estimated using a thermodynamic equation of state such as the Soave-Redlich- Kwong (SRK) equation. This equation can be used to calculate the fugacity and enthalpy of a substance and can then be used to estimate its heat of vaporization.
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3. Calculate the equilibrium concentration of each ion in a solution obtained by mixing 75. 0 mL of 2. 5 x 10-2 M AgNO3 with 25. 0 mL of 3. 2 x 10-4 M KI. Ksp Agi = 1. 5 x 10-16
Please show steps!
utilize the solubility product constant (Ksp) of AgI to determine the equilibrium concentration of each ion in a solution made by combining 75.0 mL of 2.5 x 10-2 M AgNO3 with 25.0 mL of 3.2 x 10-4 M KI.
Find the solubility initial concentration of Ag+ and I- ions in the solution as the first step. Ag+ ions are present at an initial concentration of 2.5 x 10-2 M, whereas I- ions are present at an initial concentration of 3.2 x 10-4 M. Step 2: Compose the precipitation reaction's equilibrium equation. Ag+ (aq) plus I- (aq) yields AgI. (s) Ksp = [I-][Ag+] Step 3: Solve for the equilibrium concentration of Ag+ and I- ions by substituting the starting concentrations of Ag+ and I- ions into the equilibrium formula.Ag+ and I- ion starting concentrations are not equal, and we are unsure of how much of each will react. We'll suppose that the reaction is complete and that all of the Ag+ and I- ions are converted to AgI in the end. Ag+ ions have an initial concentration of 2.5 x 10-2 M, while I- ions have an initial concentration of 3.2 x 10.
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Intercept the process shown in the image to explain your observations from question.
V for random intercepts model So that shows how the random intercepts model is allowing for that correlation between different observations from the same group.
What do observations mean?Countable noun When someone observes something or someone, they comment on it, frequently as a result of observing their behaviour.
How do i make observations?While our primary senses—seeing, feeling, hearing, and smelling—allow us to make observations directly, we may also supplement and enhance them with devices like thermometers, microscope, telescopes, radar, radioactivity sensors, X-ray diffraction, fMRI machines, mass spectrometers, etc.
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if you performed this reaction and produced 92.1 kj of energy, how many moles of water were also produced?
To calculate the number of moles of water produced in a reaction, we will need to know the balanced chemical equation for the reaction and the stoichiometry of the reactants and products.
The balanced equation will give us the mole ratio between the reactants and products, and the stoichiometry will give us the number of moles of each substance involved in the reaction. Once we have that information, you can use the mole ratio to calculate the number of moles of water produced.
One example of a reaction that produces 92.1 kJ of energy is the combustion of hydrogen gas (H2) with oxygen gas (O2) to form water vapor (H2O) and release heat energy:
2H2 + O2 -> 2H2O + heat energy (92.1 kJ)In this reaction, 2 moles of hydrogen gas and 1 mole of oxygen gas are required to produce 2 moles of water vapor and 92.1 kJ of heat energy. To calculate the number of moles of water produced in this reaction, you can use the balanced chemical equation and the stoichiometry of the reactants and products.
As per the balanced equation, 2 moles of H2 reacting with 1 mole of O2 will produce 2 moles of H2O.
So, in this reaction 2 moles of water were produced.
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vapor density is a type of physical data contained on a msds. True or false
vapor density is a type of physical data contained on a msds is True. (MSDS) Material Safety Data Sheet.
A Material Safety Data Sheet (MSDS) is a document that details how to handle chemical products safely as well as any possible risks to human health, property, or the environment. It is a crucial place to start when creating a comprehensive health and safety programme. It also includes details on how to use, store, and handle it. Weight of a gas or vapour in relation to the weight of an equivalent amount of air (air=1) is known as vapour density. Greater than 1 density means something is heavier than air, while less than 1 density means something is lighter than air. Just above the earth, vapours that are heavier than air might move and could cause an explosion or fire.
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If 76.4 grams of NH4Cl are used, how many grams of water would theoretically be produced?
25.70 g
42.5 g
20.67 g
38.2 g
The mass (in grams) of water, H₂O that would theoretically be produced is 25.70 g
How do I determine the mass of water that would be p roduced?We'll begin by writing the balanced equation for the reaction of NH₄Cl to produce water. This given below:
NH₄Cl + NaOH -> NH₃ + NaCl + H₂O
Molar mass of NH₄Cl = 53.5 g/molMass of NH₄Cl from the balanced equation = 1 × 53.5 = 53.5 g Molar mass of H₂O = 18 g/molMass of H₂O from the balanced equation = 1 × 18 = 18 gFrom the balanced equation above,
53.5 g of NH₄Cl reacted to produce 18 g H₂O
Now, we shall determine the mass of water, H₂O produced from the reaction of 76.4 g of NH₄Cl. Details below:
From the balanced equation above,
53.5 g of NH₄Cl reacted to produce 18 g H₂O
Therefore,
76.4 g of NH₄Cl will react to produce = (76.4 × 18) / 53.5 = 25.70 g of H₂O
Thus, the mass of water, H₂O produced is 25.70 g
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What do these two changes have in common? melting glass, a puddle freezing into ice on a cold night. Select all that apply. Both are caused by cooling. Both are changes of state. Both result in a different type of matter than was there before. Both are chemical changes.
The common in melting glass and a puddle freezing into ice on a cold night is because both processes involve the transformation of a solid into a liquid or the transformation of a liquid into a solid.
What do you mean by transformation?
Transformation in chemistry is the process of changing a chemical compound from one form to another. This includes the conversion of one element into another, the conversion of an ionic compound into a molecular compound, and the conversion of a solid into a liquid or a gas. Transformation can also refer to the process of changing the physical or chemical properties of a substance.
The two changes in question have these three elements in common:
a. Both are caused by cooling.
b. Both are changes of state.
c. Both result in a different type of matter than was there before.
The two changes in question have these three elements in common: they are both caused by cooling, they are both changes of state, and they both result in a different type of matter than was there before. However, they are not both chemical changes; melting glass is a physical change, while a puddle freezing into ice is a chemical change.
Hence, option A, B and C are correct.
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how long will it take for the concentration of so2cl2 s o 2 c l 2 to decrease to 25% of its initial concentration?
The time taken is 9764.4 seconds for SO₂Cl₂ to decrease to 25% of its initial concentration.
Chemical kinetics has an equation that describes how a reaction behaves over time called the integral rate law of a first-order process. The basic rate law, which states that the rate of a reaction is proportional to the concentration of the reactants, is where the equation is derived from.
Rate law expression for first order kinetics is given by the equation:
k =2.303/t log [Ao]/[A]
where,
k = rate constant =
t = time taken for decay process
[Ao] = initial concentration of the reactant = 100 grams
[A] = amount left after decay process = 25 grams
Using the values in the equation above, we obtain:
k =2.303/t log [Ao]/[A]
1.42 x 10⁻⁴s⁻¹= 2.303/t log [100]/[25]
t = 9764.4 seconds
Your question is incomplete but most probably your full question was
The decomposition of SO₂Cl₂ is first order in SO₂Cl₂ and has a rate constant of 1.42 x 10⁻⁴s⁻¹at a certain temperature. How long will it take for the concentration of SO₂Cl₂ to decrease to 25% of its initial concentration
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Determine whether the following effects of the American Revolution were political or economic. Britain acknowledged the independence of the United States. Countries that participated in the war agreed to repay debts to one another. The war opened up discussion about racial equality.
Answer: The Revolution also unleashed powerful political, social, and economic forces that would transform the post-Revolution politics and society, including increased participation in politics and governance, the legal institutionalization of religious toleration, and the growth and diffusion of the population.
Explanation: Britain spent a huge amount of money fighting the Revolutionary War, sending the national debt soaring and creating a yearly interest of nearly 10 million pounds. Taxes had to be raised as a result. The trade that Britain had relied on for wealth was severely interrupted.
large organic molecules are built on a carbon skeleton, but their unique chemical properties are determined primarily by _______________________________ that are attached to the carbon skeleton.
large organic molecules are built on a carbon skeleton, but their unique chemical properties are determined primarily by functional groups that are attached to the carbon skeleton.
The functional groups are the grouping of the components in which the different chemical reaction of theses molecule are depends. The unique chemical properties are determined by the the primarily functional groups.
The few example of functional group is given below as :
C₂H₅OH CH₃COCH₃ CH₃ CH₂ CH₂CHO
Ethanol Propanone Butanal
Alcohol Ketone Aldehyde
These are the some examples of functional groups.
Thus, the unique properties are determine by the functional groups that are attached to the carbon skeleton.
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Suppose that two students perform a titration experiment multiple times, resulting in the average concentrations reported here. Student A 0.125 ± 0.008 M Student B 0.12 ± 0.03 M
The more precise work was done by ___ because ____
Student A because they have a lower margin of error (0.008 M) than Student B (0.03 M) due to their average concentration. This suggests that compared to Student B's results, Student A's measurements were
A core or usual number within a set of data is often what is meant by the phrase "average." The mean, median, and mode are a few methods for calculating averages. The mean is calculated by dividing the total number of values in a collection of data by the number of values in the When a set of data is sorted in order, the median is the midway value.The value that appears most frequently in a collection of data is called the mode.The most frequent method for calculating averages in statistics is the mean, however depending on how the data are distributed, the median or mode may be more suitable.
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What is the molarity when 40 grams of HF is added to water to make a 500 ml solution? CzHg + 502 --> 3CO2 + 4H20
M (molarity) = moles/Liters
1000 ml= 1L
molar mass in grams = 1 mole of substance
A mol of HF has a molar mass of 20.01 + 18.998 = 39.008 g/mol. Using the formula: we can get the number of moles of HF in 40 grams. Molar mass divided by mass equals a mole.
Moles equal 40 g / 39.008 g/mol, or 1.024 moles. We may use the amount of HF we know now to calculate the molarity of the solution. Molarity = Mole/Liter Molarity: 2.048 M = 1.024 mol/(500 ml/1000 ml/L) A 2.048 mol HF solution is the answer. It's important to note that the equation you supplied for hydrogen fluoride (HF) is incorrect; the proper formula is CzHg + 502 --> 3CO2 + 4H20.A mol of HF has a molar mass of 20.01 + 18.998 = 39.008 g/mol. Using the formula: we can get the number of moles of HF in 40 grams. Molar mass divided by mass equals a mole. We may use the amount of HF we know now to calculate the molarity of the solution.
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a 5.0 g sample of a hydrate of bacl2 was heated, and only 4.3 g of the anhydrous salt remained. what percentage of water was in the hydrate?
The percentage of water in the hydrate is 14%.
To determine the percentage of water in a hydrate, you need to know the original mass of the hydrate and the mass of the anhydrous salt (the salt without water) that is left after heating.
In this case, the original hydrate had a mass of 5.0 grams and after heating, 4.3 grams of anhydrous salt remained. To find the percentage of water, you would divide the mass of the water lost (5.0g - 4.3g = 0.7g) by the original mass of the hydrate (5.0g) and multiply by 100%.
0.7g / 5.0 g × 100% = 14%
This the percentage of water in the hydrate is 14%.
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A student claims that mass is not conserved in chemical reactions and uses a reaction in which they measure the mass of liquid alcohol then light it on fire, measuring the mass of the liquid (water) remaining in the dish after the fire burns out. The mass of the liquid after the reaction is less than the mass of the alcohol before the reaction. Is this valid evidence of the student's claim? Why or why not?
- Yes, it supports the claim because the masses were not the same and were measured carefully
- No, it does not support the claim because it is not a closed system
- Yes, it supports the claim because the student completed an experiment to prove their claim
- No, there was not a chemical reaction
Answer:
no, there was not a chemical reaction
5. How many atoms are in 1.3 x 1022 molecules of NO2?
determine the phase change that carbon dioxide undergoes as temperature is increased at a constant pressure of 101 kpa (about 1 atm).
Carbon dioxide undergoes a phase change from a solid (dry ice) to a gas as the temperature is increased at a constant pressure of 101 kPa (approximately 1 atm).
When a solid substance is heated at constant pressure, its temperature increases until it reaches its melting point, at which point it will begin to melt and change from a solid to a liquid. However, some substances, such as carbon dioxide, can also undergo a phase change from a solid to a gas at a certain temperature and pressure, without going through the liquid state. This process is called sublimation.
Carbon dioxide sublimes at a temperature of -78.5 °C (-109.3 °F) at a pressure of 101 kPa (1 atm). This means that when the temperature of carbon dioxide is increased at a constant pressure of 101 kPa, it will change from a solid (dry ice) to a gas without ever becoming a liquid.
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Calculate the percent ma of olute in thi aqueou olution 5.50g of NaBr in 78.2g of olution.
The percent mass of solute in 5.50 g of NaBr in 78.2 g of solution is 7.03%.
A solute's percentage by mass in a solution tells you how many grammes of that solute there are in every 100 grammes of the solution. It's vital to remember that the solute always constitutes a smaller portion of the mixture than the solvent. The mass of the solvent and the mass of the solute together make up the total mass of a solution. By dividing the mass of the solute by the entire mass of the solution, we may get the concentration in percent by mass.
% by mass = [tex]\frac{mass of solute}{mass of solution}[/tex] × 100
We may directly calculate the percent by mass of NaBr in the solution using the solute mass and total solution mass, as illustrated.
% of NaBr = [tex]\frac{5.50}{78.2}[/tex] × 100
or, % of NaBr = 7.03%.
Hence the percent mass is 7.03%.
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