Find the percentage by mass of hydrogen in Acetic Acid (CH3COOH) (Give the answer in two decimal places)
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Mass of Acetic acid = mass of C + mass of H + mass of O
= 12×2 + 1×4 + 16×2
= 24+4+32
= 60g
Mass of H in Acetic acid = 4g
So
% of Mass Of H = 4/60 × 100
= 20/3
= 6.66% (approx)
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