Mr(NaNO3) = 23 + 14 + 16*3 = 85
Mr(K3PO4) = 39*3 + 31 + 16*4 = 212
Mr(NH4CL) = 14 + 1*3 + 35,5 = 52,5
Mr(MgSiO3) = 24 + 28 + 16*3 = 100
Mr(FeBr3) = 56 + 80*3 = 296
Mr(P2O5) = 31*2 + 16*5 = 142
Mr(NaNO3) = 23 + 14 + 16*3 = 85
Mr(K3PO4) = 39*3 + 31 + 16*4 = 212
Mr(NH4CL) = 14 + 1*3 + 35,5 = 52,5
Mr(MgSiO3) = 24 + 28 + 16*3 = 100
Mr(FeBr3) = 56 + 80*3 = 296
Mr(P2O5) = 31*2 + 16*5 = 142