a) mCuO = 40% .30 = 12(g)
=>nCuO=\(\frac{12}{80}\)=0,15(mol)
mFeO = 30-12=18(g)
=> nFeO = \(\frac{18}{72}\)=0,25(mol)
Ta có PT
CuO + H2 ---> Cu + H2O
0,15..0,15.........0,15..0,15
FeO + H2 ---> Fe + H2O
0,25..0,25......0,25...0,25
b) mCu = 0,15.64=9,6(g)
mFe = 0,25.56=14(g)
c) n\(H_2\)= 0,15+ 0,25 = 0,4(mol)
=> V\(H_2\)= 0,4.22,4 = 8,96(l)