Prentice Hall Chemistry Chapter 10: Chemical Quantities 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!

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Question 1 1. Standard temperature and standard pressure refer to:

Question 2 2. What is the percent composition of Cu₂S?

Question 3 3. What does the empirical formula show?

Question 4 4. 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?

Question 5 5. Which of the following calculations is NOT needed to determine the empirical formula?

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Question 6 6. Given a balanced equation involving A and B, which set of conversions must you make to change mass A to mass B?

Question 7 7. An expandable container is holding 0.75 moles of argon with a volume of 5.0 L. Assuming the temperature and pressure are held constant, how many moles of argon would be needed to increase the volume to 7.0 L?

Question 8 8. Avogadro's law shows the relationship between _____.

Question 9 9.

A piece of copper wire contains 5 moles of copper atoms. What is its mass?

(The molecular mass of copper is 63.5 g/mol.)

Question 10 10. A container has a volume of 53.9 L. Assuming it is at STP, how many moles of gas particles does it contain?

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Question 11 11. The starting point of a stoichiometric problem is _____.

Question 12 12. A tenth of a mole of pennies contains how many pennies?

Question 13 13. What is the empirical formula of a compound containing (by mass) 36.5% sulfur and 63.5% iron?

Question 14 14.

A piece of aluminum foil has a mass of 27 grams. About how many atoms does this contain?

(Aluminum has a molecular mass of 27 g/mol.)

Question 15 15. What is the percent composition of H₂SO₃?

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Question 16 16. 3.9g of potassium reacts with water to produce potassium hydroxide and hydrogen gas. Calculate the mass of potassium hydroxide produced.

Question 17 17. What volume is occupied by 15.0 moles of carbon dioxide gas at standard temperature and pressure?

Question 18 18.

A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass?

(The molecular mass of silicon is 28 g/mol.)

Question 19 19.

A piece of pencil graphite (made of carbon atoms) has a mass of 0.12 grams. How many moles of carbon atoms are in the lead?

(The molecular mass of carbon is 12 g/mol.)

Question 20 20. How is mass of a substance connected to its amount in mole(s)?

Prentice Hall Chemistry Chapter 10: Chemical Quantities 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!

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