5минут определите молекулярную массу: nacl cacl2 cao ncl fe(oh)3 h2so4 na3po4 kno3 naoh p2o5

М(NaCl) =23+ 35 = 58

M(CaCl2) = 40 + 35*2=110

M(CaO) = 40 + 16=56

M(NCl) = 14 + 35=49

M(Fe(OH)3 = 56+16*3 + 1*3 =107

M(H2SO4 = 1*2 + 32+16*4 = 98

M( Na3PO4 = 23*3 + 31 + 16*4 = 164

M(KNO3 = 39+14 + 16*3 = 101

M(NaOH) = 23 +16 +1=  40

M(P2O5) = 31 *2 + 16*5 = 142