Verified answer

Mr(N2) = 14 × 2 = 28

Mr(SO2) = 1 × 32 + 2 × 16 = 64

Mr(MgO) = 1 × 24 + 1 × 16 = 40

Mr(Al) = 27

Ответ:N2 - 28
Al - 27
SO2 - 64
MgO - 40

Объяснение: