1. Calculate the Molar Mass  Magnesium chloride Ammonium sulfate  Answers: 95.21 g/mol; 132.17 g/mol

2. Convert to Moles  120.4 grams of He  30.1 grams of Cu

3. Convert to Moles  3.61 grams of Fe  100 grams of Ar

4. Convert to Moles  1gram of S  4.5 grams of Zn

5. Convert to Moles  24 grams of C  59.3 grams of Sn

6. Convert to Moles  98.9 grams Na  5000 grams of K

7. Convert to Mass  10.0 moles Na  2.20 moles Sn

8. Convert to Mass  5.00 moles Ag  3.0 x 10 -4 moles Au

9. Mole Ratio ____BaCl 2 + ____KClO 3 → ____Ba(ClO 3 ) 2 + ____KCl Balance the equation above and give the mole ratios of the following  BaCl 2 : KClO 3  KCl : BaCl 2  Ba(ClO 3 ) 2 : KClO 3

10. Mole Ratio _____CaCO 3 → _____CaO + _____CO 2 Balance the equation above and give the mole ratios of the following:  Moles of calcium carbonate : moles of calcium oxide  Moles of carbon dioxide : moles of calcium carbonate

11. Mole-Mole Balance the equation and the answer the questions for the following _____C 3 H 8 + _____O 2 → _____H 2 O + _____CO 2  How many moles of water will be produced if 1.2 mol of oxygen reacts with C 3 H 8 ?  How many moles of O 2 are needed to produce 3.7 mol of H 2 O?

12. Mole-Mole _____K + _____HgCl 2 → _____Hg + _____ KCl Balance the equation above and answer the following questions:  How many moles of potassium are needed to react with.633 moles of HgCl 2 ?  How many moles of potassium chloride will be produced if 2.3 moles of potassium react with HgCl 2 ?

13. Mole-Mass ____Ba(CN) 2 + ____H 2 SO 4 → ____BaSO 4 + ____HCN Balance the equation above and answer the following questions:  How many moles of barium cyanide are needed to produce 12.0 grams of barium sulfate?  How many grams of hydrogen cyanide are produced when 4.7 moles of barium cyanide react with sulfuric acid?

14. Mass-Mass _____H 2 + _____O 2 → _____H 2 O Balance the equation above and answer the following questions:  If you start with 10.0 grams of hydrogen, how many grams of water will be produced?  How many grams of oxygen are needed to react with 13.6 grams of hydrogen?

15. Mass-Mass ___ HCl + ___ Na 2 SO 4  ___ NaCl + ___ H 2 SO 4 Balance the equation above and answer the following questions:  How many grams of hydrochloric acid are needed to produce 20 grams of sulfuric acid?  How many grams of sodium chloride will be produced if 5.3 grams of sodium sulfate reacts with hydrochloric acid?