A student determines the zinc content of a solution by first precipitating it as zinc hydroxide, and then decomposing the hydroxide to zinc oxide by heating. How many grams of zinc oxide should the student obtain if her solution contains 38.0 mL of 0.501 M zinc nitrate?

Answer 1

mols Zn(NO3)2 = M x L = ?
1 mol Zn in 1 mol Zn(NO3)2
1 mol ZnO in 1 mol Zn
g ZnO = mols ZnO x molar mass ZnO.