Physical Science - Stoichiometry: Tutoring Solution Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Determine the actual yield if the theoretical yield is 12 g and the percentage yield is 90%.

Question 2 2. At STP, how much space (in liters) will 0.750 moles of argon gas occupy?

Question 3 3. You conduct an experiment that requires the creation of an ammonia solution. You do this by reacting 50.0 L of nitrogen gas with excess hydrogen gas at STP to create ammonia gas using the Haber process given by the following reaction: N2 (g) + 3H2 (g) → 2NH3 (g). Assuming the reaction had 100% yield, you then bubble the ammonia into 5.0 L of water. What is the molarity of the resulting ammonia solution?

Question 4 4. Which of the following mole ratio is NOT appropriate to the equation 6CO2+ 6H2 O → C6 H12 O6+ 6O2?

Question 5 5. What is the actual yield?

Page 2

Question 6 6. Conservation of matter means that:

Question 7 7. What is meant by the term molar volume?

Question 8 8. How many moles of N2 are needed to produce 18 moles NH3 in the reaction N2 + 3H2 → 2NH3?

Question 9 9. How is a mole ratio used?

Question 10 10. Given a balanced equation involving A and B, which set of conversions must you make to change mass A to mass B?

Page 3

Question 11 11. How many moles of solute are in a 0.50 L solution of 3.0 molarity?

Question 12 12. What is the volume of 2 moles of a gas at 300K and 1.25atm?

Question 13 13. What is the difference between a hydrate and an anhydrate?

Question 14 14. Which of the following equations is balanced?

Question 15 15. How do you determine the amount of product made?

Page 4

Question 16 16. How many moles of Na are needed to produce 15 moles of NaCl in the reaction 2Na + Cl2 → 2NaCl?

Question 17 17. If 2.5 moles of zinc react with 6.0 moles of hydrochloric acid in the equation Zn + 2HCl = ZnCl2 + H2, what is the limiting reactant?

Question 18 18. If there are three moles of H2 O for every one mole of LiClO4, then what is the hydrate formula?

Question 19 19. What is theoretical yield?

Question 20 20. If 1.605 kg of mercury are used in the reaction 2Hg + O2 --> 2HgO, what is the mass of HgO, in kilograms, that are produced?

Page 5

Question 21 21. Determine the percent yield if the theoretical yield is 20 g and the actual yield is 15 g.

Question 22 22. The starting point of a stoichiometric problem is _____.

Question 23 23. If 4.0 moles of HCl react with 5.0 moles of NaOH to make NaCl and H2 O in the equilibrium reaction HCl+ NaOH = NaCl + H2 O, what is the limiting reactant?

Question 24 24.

Choose the correctly balanced equation for the following reaction:

Sodium + water → sodium hydroxide + hydrogen gas

Question 25 25. What is the hydrate formula when there are 0.02 moles BaCl2 and 0.04 moles H2 O?

Page 6

Question 26 26. How is percent yield calculated?

Question 27 27. Select the most suitable definition for stoichiometry.

Question 28 28. Which of the following calculations is NOT needed to determine the empirical formula?

Question 29 29. What is a limiting reactant?

Question 30 30. In the formula MgSO4 nH2 O, what does the n before the H2 O stand for?

Physical Science - Stoichiometry: Tutoring Solution Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

High School Physical Science: Tutoring Solution  /  Science Courses
Support