Option 1: Sierra is doing a lab to make elephant toothpaste. She can see from the lab that...
Option 1: Sierra is doing a lab to make elephant toothpaste. She can see from the lab that hydrogen peroxide (H2O2) is reacting to form water and oxygen.
Write a balanced equation for this reaction.
If she measures 140g of starting solution and it is 40% hydrogen peroxide by mass, how many grams of hydrogen peroxide does she start out with?
How many moles of water will form?
How many grams of water will form?
How many moles of oxygen will form?
How many grams of oxygen will form?
Homework Answers
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Option 1: Sierra is doing a lab to
make elephant toothpaste. She can see from the lab that...
Option 2: Kim thinks she’s got Avogadro’s number down, she can use it to get to molecules...
Option 2: Kim thinks she’s got Avogadro’s number down, she can use it to get to molecules from moles and to moles from molecules, but she runs into a roadblock when they start using atoms within the molecules. She comes to you with the following problems and wants a step by step explanation of how to solve them. What conversions would you have her use? What steps are involved for each one? How would you explain how these are different from the problems she already...
Please help with the post lab and the pre lab (except for obviously #1 on the...
Please help with the post lab and the pre lab (except for
obviously #1 on the post lab) thank you!
PRELAB name: What is the ideal gas law? Write the equation below and label all the components of the equation. Write the balanced chemical equation for the reaction between Mg and HCl below include phases of each constituent. Mg + HCI 3. If a student used an excess of HCl to dissolve 0.045 grams of pure Mg ribbon, and collected...
1. Given the following reaction, use Stoichiometry to answer the following questions: 2 H2O2 (I) →...
1. Given the following reaction, use Stoichiometry to answer the following questions: 2 H2O2 (I) → 2 H2O (I) + O2 (g) ΔH° = -196.1 kJ a. When O2 is formed is the reaction exothermic or endothermic? How can you tell from the information provided with the balanced equation? b. How many grams of hydrogen peroxide are required to form 4.20 mol O2? c. How much heat is exchanged when 24 kg of hydrogen peroxide decomposes? d. How much oxygen...
Pre-Lab Study Questions - Lab 9 (Reaction Stoichiometry and Moles) Date: Name: Section: Team: Instructor: 1....
Pre-Lab Study Questions - Lab 9 (Reaction Stoichiometry and Moles) Date: Name: Section: Team: Instructor: 1. In the formula Mgo, what is the relative mass ratio of magnesium to oxygen? What is the "count ratio of magnesium to oxygen in MgO? Why are the two ratios different? NNNNNNNNNNNNNNNNN11111111111111111 2. Write a balanced equation for the reaction of sodium and sulfur to form sodium sulfide. 3. Using the equation above, how many grams of sulfur are consumed with 0.750 g of...
Name: Date: Instructor's Initials: Lab Section: The Ideal Gas Constant PreLab: sing the Balanced Equation (1),...
Name: Date: Instructor's Initials: Lab Section: The Ideal Gas Constant PreLab: sing the Balanced Equation (1), determine how many moles of hydrogen should be produced by 0.036 grams of Mg metal using an excess of HCI. If the average temperature of the water was 21.5 °C, what pressure inside the Graduated cylinder is contributed by the water vapor? (See Table 1). 3. If the atmospheric pressure in the lab was 754 mmHg on that day, what would be the pressure...
thjs is the question this is the data these are the background information please help thank...
thjs is the question
this is the data
these
are the background information
please help thank you
4. Approximate the number of moles of hydrogen peroxide at the equivalence point in the graph in the introduction, supposing a 3.00% m/m solution. Thus the densities will be- Trial Mass(g) 0.448 0.450 3 Density(g/ml) 0.448 g/ 0.400 ml = 1.12 g/ml 0.450 g/ 0.400 ml = 1.125 g/ml 0.437 g/ 0.400 ml = 1.0925 g/m 0.442 g/ 0.400 ml = 1.105 g/ml...
2. Mass-mass problems. Show your work and label your answers. a. How many grams of sulfur...
2. Mass-mass problems. Show your work and label your answers. a. How many grams of sulfur dioxide are needed to react with 10.0 g of oxygen gas according to the following UNBALANCED reaction? SO2 + O2 → SO3 b. Aluminum reacts with hydrogen sulfate to produce aluminum sulfite and water. If 32.3 grams of aluminum are used, how many grams of aluminum sulfite can be produced? C Hard water contains calcium sulfate and can be softened by adding sodium carbonate...
Problem Set 7 Stoichiometry Calculations Name: Date: Lab Section: General Instructions: Complete the following problems, Circle...
Problem Set 7 Stoichiometry Calculations Name: Date: Lab Section: General Instructions: Complete the following problems, Circle answers and show all work on separate sheet(s) of paper. 5 problems will be chosen randomly for assessing a score on this assignment. Assignment is due at the end of the lab period. 1.) 5.0 g of magnesium metal is burned in excess oxygen to produce magnesium oxide. (a) Write a balanced chemical equation for this reaction with the correct phases of all substances...
Show all working clearly, give all details where necessary and provide complete sentences for fullmarks 1....
Show all working clearly, give all details where necessary and provide complete sentences for fullmarks 1. What is meant by the term o metry? 2. Why is the relative number of moles of reactants and products the most important information that a balanced chemical equation provides? points) 3. Define the term moler mais 4. The coeficients from a balanced chemical equation are used to write conversion factors called 5. How many molecules are there in: 2.00 moles of ammonia? How...
Name FUL L U Stoichiometry worksheet (Lab) Please complete the following problems during lab. Do all...
Name FUL L U Stoichiometry worksheet (Lab) Please complete the following problems during lab. Do all of your work on a separate sheet of paper. Show all of your work for full credit and circle your final answer. 1) How many moles of CO2 are produced when 2.5 moles of O2 react according to the following equation? C3H8 (8) +502 (8) ► 3002 (8) + 4H20 (8) 2) In the reaction 2 C(s) + O2(g) 66.0 g of carbon monoxide?...
Please help with the post lab and the pre lab (except for
obviously #1 on the post lab) thank you!
PRELAB name: What is the ideal gas law? Write the equation below and label all the components of the equation. Write the balanced chemical equation for the reaction between Mg and HCl below include phases of each constituent. Mg + HCI 3. If a student used an excess of HCl to dissolve 0.045 grams of pure Mg ribbon, and collected...
Pre-Lab Study Questions - Lab 9 (Reaction Stoichiometry and Moles) Date: Name: Section: Team: Instructor: 1. In the formula Mgo, what is the relative mass ratio of magnesium to oxygen? What is the "count ratio of magnesium to oxygen in MgO? Why are the two ratios different? NNNNNNNNNNNNNNNNN11111111111111111 2. Write a balanced equation for the reaction of sodium and sulfur to form sodium sulfide. 3. Using the equation above, how many grams of sulfur are consumed with 0.750 g of...
Name: Date: Instructor's Initials: Lab Section: The Ideal Gas Constant PreLab: sing the Balanced Equation (1), determine how many moles of hydrogen should be produced by 0.036 grams of Mg metal using an excess of HCI. If the average temperature of the water was 21.5 °C, what pressure inside the Graduated cylinder is contributed by the water vapor? (See Table 1). 3. If the atmospheric pressure in the lab was 754 mmHg on that day, what would be the pressure...
thjs is the question
this is the data
these
are the background information
please help thank you
4. Approximate the number of moles of hydrogen peroxide at the equivalence point in the graph in the introduction, supposing a 3.00% m/m solution. Thus the densities will be- Trial Mass(g) 0.448 0.450 3 Density(g/ml) 0.448 g/ 0.400 ml = 1.12 g/ml 0.450 g/ 0.400 ml = 1.125 g/ml 0.437 g/ 0.400 ml = 1.0925 g/m 0.442 g/ 0.400 ml = 1.105 g/ml...
2. Mass-mass problems. Show your work and label your answers. a. How many grams of sulfur dioxide are needed to react with 10.0 g of oxygen gas according to the following UNBALANCED reaction? SO2 + O2 → SO3 b. Aluminum reacts with hydrogen sulfate to produce aluminum sulfite and water. If 32.3 grams of aluminum are used, how many grams of aluminum sulfite can be produced? C Hard water contains calcium sulfate and can be softened by adding sodium carbonate...
Problem Set 7 Stoichiometry Calculations Name: Date: Lab Section: General Instructions: Complete the following problems, Circle answers and show all work on separate sheet(s) of paper. 5 problems will be chosen randomly for assessing a score on this assignment. Assignment is due at the end of the lab period. 1.) 5.0 g of magnesium metal is burned in excess oxygen to produce magnesium oxide. (a) Write a balanced chemical equation for this reaction with the correct phases of all substances...
Show all working clearly, give all details where necessary and provide complete sentences for fullmarks 1. What is meant by the term o metry? 2. Why is the relative number of moles of reactants and products the most important information that a balanced chemical equation provides? points) 3. Define the term moler mais 4. The coeficients from a balanced chemical equation are used to write conversion factors called 5. How many molecules are there in: 2.00 moles of ammonia? How...
Name FUL L U Stoichiometry worksheet (Lab) Please complete the following problems during lab. Do all of your work on a separate sheet of paper. Show all of your work for full credit and circle your final answer. 1) How many moles of CO2 are produced when 2.5 moles of O2 react according to the following equation? C3H8 (8) +502 (8) ► 3002 (8) + 4H20 (8) 2) In the reaction 2 C(s) + O2(g) 66.0 g of carbon monoxide?...
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