p=mp/mimp*100=>mp=82*280/100=229,6g Zn
Zn + 2HCl => ZnCl2 + H2
65g Zn......................136g ZnCl2
229,6g Zn....................xg ZnCl2
x=136*229,6/65 =
65g Zn.............................1 mol H2
229,6g Zn.......................x moli H2
x=1*229,6/65 =