a) CHCl3
Mr(CHCl3) = 12 + 1 + 35.5 × 3 = 119.5
Массовые доли:
w(C) = (12 / 119.5) × 100% = 10.04%
w(H) = (1 / 119.5) × 100% = 0.84%
w(Cl) = (35.5 × 3 / 119.5) × 100% = 89.12%
б) K2SiO3
Mr(K2SiO3) = 39 × 2 + 28 + 16 × 3 = 154
Массовые доли:
w(K) = (39 × 2 / 154) × 100% = 50.65%
w(Si) = (28 / 154) × 100% = 18.18%
w(O) = (16 × 3 / 154) × 100% = 31.17%