- H₂SO₃
- M(H₂SO₃) = 2 × 1 + 32 + 3 × 16 = 2 + 32 + 48 = 82 г/моль
- w(H) = (2 × 1) / 82 = 2/82 = 0,0244 или 2,44%
- C₂H₅OH
- M(C₂H₅OH) = 2 × 12 + 5 × 1 + 16 + 1 = 24 + 5 + 16 + 1 = 46 г/моль
- w(H) = (6 × 1)/46 = 6/46 = 0,1304 или 13,04%
- C₆H₁₂O₆
- M(C₆H₁₂O₆) = 6 × 12 + 12 × 1 + 6 × 16 = 72 + 12 + 96 = 180 г/моль
- w(H) = (12 × 1)/180 = 12/180 = 0,0667 или 6,67%
Ответ: w(H) = 2,44%; 13,04%; 6,67%