Найти молекулярную массу подробно

1. (NaNO3) 2

2 (Fe2So4) 3

3K2HPO4

4H3PO4

1. NaNO3: M (Na) = 23 M (N) = 14 M (O) = 16

M (NaNO3) = 23+14+16*3=85

2. Fe2 (SO4) 3: M (Fe) = 56 M (S) = 32 M (O) = 16

M (Fe2 (SO4) 3) = 56*2+32*3+16*4*3=400

3. K2HPO4: M (K) = 39 M (H) = 1 M (P) = 31 M (O) = 16

M (K2HPO4) = 2*39+1+31+16*4=174

4. H3PO4: M (H) = 1 M (P) = 31 M (O) = 16

M (H3PO4) = 1*3+31+16*4=98