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Mr CO₂ = 44
massa C = (Ar C/Mr CO₂) x massa CO
= 12/44 x 8,8
= 2,4 gram
% C = (massa C/massa hidrokarbon) x 100%
= 2,4/24 x 1005
= 10%
Jadi, presetase massa karbon dalam cuplikan itu adalah 10%