Мr(H2O) = 1 × 2 + 16 × 1 = 18
Mr(FeS) = 56 × 1 + 32 × 1 = 88
Mr(O2) = 16 × 2 = 32
Mr(NaCl) = 23 × 1 + 35,5 × 1 = 58,5
Mr(CO2) = 12 × 1 + 16 × 2 = 44
Мr(H2O) = 1 × 2 + 16 × 1 = 18
Mr(FeS) = 56 × 1 + 32 × 1 = 88
Mr(O2) = 16 × 2 = 32
Mr(NaCl) = 23 × 1 + 35,5 × 1 = 58,5
Mr(CO2) = 12 × 1 + 16 × 2 = 44