ocr: CH111 FINAL 1987 PAGE2 - - - 6. The retining of aluminum from bauxite ore (which contains 50t Al.o by mass) proceeds by the overall reuction 2A1,0s + JC --- 4A1 + 3cOn How much bauxite ore is required to give the 5.0 x 1011 9 of aluminum produced each year in the United States? (Assume 100% conversion.) al 1.3 X 1012 g b) 5.3 x 1013 a c) 1.9 x 104 a d) 7.6 x 1014 a 7. The atomic weight of rhenium is 166.2, Given that 37-1% of natural rhenium is rhenium-185. what is the other tabie isotope? : 1*3 147 19 181 190 Re b) Re *o ke el Re 75 75 75 75 75 a 15-9 ampie of lithium in reacted with 15 a of ...
