Question

Mg(OH)2
M=
%O=
God help me​

Answer 1

Ответ:

M(Mg(OH)2) = 24+ (16+1)*2)  = 58 g/mol

W(O) = Ar(O)*n / M(Mg(OH)2) * 100%

W(O) = 16*2 / 58 *100% = 55.17%

Объяснение: