1. Which of the following minerals is a sulfide? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.beryl 2.chalcopyrite 3.dolomite 4.rock salt 5.magnetite

2. Which one of the following ores is not a sulfide ore? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.chalcopyrite 2.chalcocite 3.galena 4.dolomite 5.cinnabar

3. Which of the following statements about natural sources of the elements is incorrect? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.Helium is obtained from wells in the United States and Russia. 2.Halide salts of many of group IA elements are found in oceans, salt lakes, and brine wells. 3.Most noble gases (other than helium) are obtained from air. 4.Gold, platinum, and palladium are found as uncombined native ores. 5.Nitrogen and oxygen are obtained from water.

4. Extraction of metals from one of the following classes of ores is difficult and expensive. Which class? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.oxide ores 2.sulfide ores 3.halide ores 4.carbonate ores 5.silicate ores

5. Heating of what mass of a sample containing 65.0% of Mg(OH) 2 would produce 134.8 g of MgO? Assume complete reaction and no other source of magnesium. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.300 g 2.123,4 g 3.67.4 g 4.104 g 5.150 g

6. Consider the roasting of 10.0 tons of sphalerite which is 60.0% ZnS. Assume that all the ZnS is converted to ZnO, and no other sulfur sources are present. How many tons of SO 2 are produced? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.2.36 tons 2.3.94 tons 3.5.34 tons 4.6.00 tons 5.6.57 tons

7. What mass of Cl 2 would be produced by the electrolysis of 219 grams of molten NaCl? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.66.4 g 2.200. g 3.100. g 4.133 g 5.266 g

8. What mass of chlorine would be produced by the complete electrolysis of a sample of molten CaCl 2 if the process produced 56.9 g of Ca? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.39.7 g 2.167 g 3.49.8 g 4.25.8 g 5.101 g

9. What mass of hematite ore that is 76.0% Fe 2 O 3 contains 95 g of Fe? Assume no other form of Fe is present. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.89.3 g 2.178.6 g 3.201.4 g 4.42.5 g 5.95 g

10. What mass of Cu would be present in 36.0 g of pure malachite, CuCO 3 · Cu(OH) 2 ? 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.20.7 g 2.18.1 g 3.12.2 g 4.23.2 g 5.13.9 g