m Fe = 46/100*30,5=14,03g
n=m/M=14,03/56=0,25 moli Fe
m Zn = 0,54*30,5=16,47g
n=m/M=16,47/65=0,2533 moli Zn
Fe + H2SO4 -> FeSO4 + H2
n Fe = nH2 = 0,25 moli
m H2 = 0,25*2=0,5g
Zn + H2SO4 -> ZnSO4 + H2
nZn=nH2=0,2533 moli
mH2 = 0,2533*2=0,5g H2
m H2 total = 0,5+0,5=1g H2