Помогите решить !!!!!!
Mr (C6 H6)=
Mr (H2 SO3)=
Mr (H2 CO3)=
Mr (P2 O5)=
Mr (N2 O3)=
Mr (H F)=

Mr(C6H6) = 12*6 + 1*6 = 78

Mr(H2SO3) = 1*2 + 32 + 16*3 = 82

Mr(H2CO3) = 1*2 + 12 + 16*3 = 62

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

Mr(N2O3) = 14*2 + 16*3 = 76

Mr(HF) = 1 + 19 = 20