What is the mass percent of oxygen in ethanol? - Infinity Learn by Sri Chaitanya

A
52.14 %
B
13.13 %
C
16 %
D
34.78 %

Solution:

Molecular formula of ethanol = C₂H₅OH
Molar mass of ethanol = 2 x 12 + 6 x 1 + 16 = 46 g
Mass per cent of oxygen $= \frac{16}{46} \times 100 = 34.78 %$

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