HCOОH + Ag2O = CO2 + H2O + 2Ag
Mr(FePO₄)=56+31+16x4=151
Mr[AI₂(CO₃)₃] = 27x2 + (12+16x3)x3=234
Mr(СН₃СН₂СН₂СН₃)=12+3+12+2+12+2+12+3=58