What is the mass per cent of oxygen in ethanol? | Chemistry | SolveeIt

Question

What is the mass per cent of oxygen in ethanol?

$52.14 \%$

$13.13 \%$

$16 \%$

$34.73 \%$

Answer

$34.73 \%$

Explanation

Solution

Molecular formula of ethanol $= C_{2}H_{5}OH$ Molar mass of ethanol $= 2 \times 12.01 + 6 \times 1.008 + 16$ $= 46.068\, g$ Mass per cent of oxygen $=\frac{16}{46.068} \times 100$ $= 34.73\%$

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