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1. what weight in grams of magnesium oxide will produce from burning 96 grams of magnesium?
2. a solution containing 252g of calcium sulfate will produce from 165lbs of phosphate rocks containing 82.5 % pure calcium phosphate treated with sulfuric acid?
3. how many tons of quicklime(calcium oxide)yield out of heating 675 tons of limestone(impure calcium carbonate) containing 95 % pure calcium carbonate?
4. calculate the amt of hydrogen liberated in liter when 260g of zinc treated with sulfuric acid?

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