1. © 2012 Pearson Education, Inc. Chapter 3 STOICHIOMETRY: CALCULATIONS WITH CHEMICAL FORMULAS AND EQUATIONS James Hill California State University, Sacramento with contributions by Todd Austell Give It Some Thought Clicker Questions

2. © 2012 Pearson Education, Inc. A. 1 Mg, 2 O, and 2 H B. 2 Mg, 2 O, and 2 H C. 6 Mg, 6 O, and 6 H D. 3 Mg, 6 O, and 6 H

3. © 2012 Pearson Education, Inc. A.NaS B.NaS 2 C. Na 2 S D. Na 2 S 2

4. © 2012 Pearson Education, Inc. a. A.Mole of glucose B.Mole of water

5. © 2012 Pearson Education, Inc. b. A.Mole of water B.Mole of glucose C.Requires Avogadro’s number to answer question D. They both contain the same number of molecules

6. © 2012 Pearson Education, Inc. A.1:2 B.2:1 C.4:2 D.1:1

7. © 2012 Pearson Education, Inc. A.An incorrect molar mass for carbon is used in the problem. B.Approximations are used in the problem. C.An incorrect number of significant figures is used in the problem. D.Experimental uncertainties in the experimental measurements.

8. © 2012 Pearson Education, Inc. A.1.57 mol B.3.14 mol C.6.28 mol D.9.42 mol

9. © 2012 Pearson Education, Inc. A.10.00 g B.20.00 g C.30.00 g D.50.00 g