Mr(CH3COOH) = Mr = 2Ar(C) + 4Ar(H) + 2Ar(O) = 2 * 12 + 4 * 1 + 2 * 16 = 60
w(C) = 2Ar(C) / Mr = 24 / 60 = 0.4 = 40%
w(H) = 4Ar(H) / Mr = 4 / 60 = 0.0667 = 6.67%
w(O) = 2Ar(O) / Mr = 32 / 60 = 0.5333 = 53.33%
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Mr(CH3COOH) = Mr = 2Ar(C) + 4Ar(H) + 2Ar(O) = 2 * 12 + 4 * 1 + 2 * 16 = 60
w(C) = 2Ar(C) / Mr = 24 / 60 = 0.4 = 40%
w(H) = 4Ar(H) / Mr = 4 / 60 = 0.0667 = 6.67%
w(O) = 2Ar(O) / Mr = 32 / 60 = 0.5333 = 53.33%