Mr (Mg(NO3)2) = Ar (Mg) + 2 Ar (N) + 6 Ar (O) = 24 + 2 × 14 + 6 × 16 = 148
ответ:W (Mg) =16.21%
W (N) = 18.91%
W (O) =64.86%
Объяснение:
Mr (Mg(NO3) 2) = 24+28+96=148 грамм
W (Mg) = 24/148*100%=16.21%
W (N) = 28/148*100%=18.91%
W (O) = 96/148*100%=64.86%
