If 0.2 gram of an organic compound containing carbon, hydrogen and...

If 0.2 gram of an organic compound containing carbon, hydrogen and oxygen on combustion, yielded 0.147 gram carbon dioxide and 0.12 gram water. What will be the content of oxygen in the substance?

Options

A $73.29 \%$
B $78.45 \%$
C $83.23 \%$
D $89.50 \%$

Correct answer

A. $73.29 \%$

Step-by-step solution

\%

\mathrm{C}=\frac{12}{44} \times \frac{0.147}{0.2} \times 100=20.045 \%\%

\mathrm{H}=\frac{2}{18} \times \frac{0.12}{0.2} \times 100=6.666 \%\%

\mathrm{O}=100-(20.045+6.666)=73.29 \%

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