Sơ đồ: M + O2 → CO2 + H2O
PTHH: CO2 + Ca(OH)2 → CaCO3 + H2O
n(CO2) = n(CaCO3) = 36: 100 = 0,36 mol
n(O2 kk) = (1:5) . (63.28 : 22,4) = 0,565 mol
BTNT (O): n(O2 kk) = n(CO2) + (nH2O : 2)
Suy ra n(H2O) = 0,41 mol
BTKL: m = 0,36. 44 + 0,41. 18 – 0,565. 32 = 5,14 gam.