задание на фото срочно пж

Ответ:

M(Cl2) = 2 × (M(Cl)) = 2 × 35.45 = 70.90 g/mol

Mr(H2S) = 2 × (M(H)) + M(S) = 2 × 1.008 + 32.06 = 34.076 g/mol

M(SO2) = M(S) + 2 × (M(O)) = 32.06 + 2 × 16.00 = 64.06 g/mol

M₁(H2SiO3) = 2 × (M(H)) + M(Si) + 3 × (M(O)) = 2 × 1.008 + 28.09 + 3 × 16.00 = 78.15 g/mol

M(Al(OH)3) = M(Al) + 3 × (M(H)) + 3 × (M(O)) = 26.98 + 3 × 1.008 + 3 × 16.00 = 78.00 g/mol

M(Mg3(PO4)2) = 3 × (Mg) + 2 × (M(P)) + 8 × (M(O)) = 3 × 24.31 + 2 * 30.97 + 8 * 16.00 = 262.86 g/mol

Відповідь:

Mr(Cl2)= 35,5+35,5=71

Mr(H2S)= 2+32=34

Mr(H2SiO3)= 2+28+ 48= 78

Mr(Al(OH)3)=27+17×3= 78

Mr(Mg3(PO4)2= 24×3+ (31+64)×2= 262