calculate the minimum volume of hydrogen gar hn cubic centimetres required to convert 3.18 g of CuO to Cu at s.t.p.
(Cu=64, O=16, H=1; molar gas volume at stp = 22.4 dm^3
CuO + H2 ==> H2O + Cu
mols CuO = grams/molar mass = ?
mols CuO = mols H2 gas
PV = nRT--substitute mols H2 gas, R, T, P and solve for V in liters. Convert L to cc. (mL)
Post your work if you get stuck.