Homw many grams of copper sulfate pentahydrate (CuSo4 5H2O) would you heat to produce 29.8 g of water?

Answer 1

29.8 g H2O is 29.5/18 moles

1/5 of that is 29.5/(5*18). THat is the number of moles of copper sulfate pentahydrate. Convert that to grams.