H2+CuO-to>Cu+H2O
0,22---------------0,22
n H2=\(\dfrac{4,928}{22,4}\)=0,22 mol
n CuO=\(\dfrac{20}{80}\)=0,25 mol
=>H2 hết , CuO dư
=>m Cu =0,22.64=14,08g
=>H=\(\dfrac{12}{14,08}.100\)=85,23%
nH2 = 0,22 (mol)
nCuO = 20/80 = 0,25 (mol)
nCu (TT) = 12/64 = 0,1875 (mol)
PTHH: CuO + H2 -> (t°) Cu + H2O
LTL: 0,25 > 0,22 => CuO dư
nCu (LT) = nH2 = 0,22 (mol)
H = 0,1875/0,22 = 85,22%