- H₂SO₃:
- Mr(H₂SO₃) = 2Ar(H) + Ar(S) + 3Ar(O) = 2 * 1 + 32 + 3 * 16 = 2 + 32 + 48 = 82.
- ω(H) = (2Ar(H) / Mr(H₂SO₃)) * 100% = (2 * 1 / 82) * 100% ≈ 2.44%.
- C₂H₅OH:
- Mr(C₂H₅OH) = 2Ar(C) + 6Ar(H) + Ar(O) = 2 * 12 + 6 * 1 + 16 = 24 + 6 + 16 = 46.
- ω(H) = (6Ar(H) / Mr(C₂H₅OH)) * 100% = (6 * 1 / 46) * 100% ≈ 13.04%.
- C₆H₁₂O₆:
- Mr(C₆H₁₂O₆) = 6Ar(C) + 12Ar(H) + 6Ar(O) = 6 * 12 + 12 * 1 + 6 * 16 = 72 + 12 + 96 = 180.
- ω(H) = (12Ar(H) / Mr(C₆H₁₂O₆)) * 100% = (12 * 1 / 180) * 100% ≈ 6.67%.
Ответ: ω(H) в H₂SO₃ ≈ 2.44%; в C₂H₅OH ≈ 13.04%; в C₆H₁₂O₆ ≈ 6.67%.