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  4. 0.765 g of an acid gives 0.535 g of CO 2 and 0.138 g of H 2 O . Then the ratio of the percentage of carbon and hydrogen is

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Q. $0.765 \,g$ of an acid gives $0.535 \,g$ of $CO _{2}$ and $0.138 \,g$ of $H _{2} O .$ Then the ratio of the percentage of carbon and hydrogen is

Organic Chemistry – Some Basic Principles and Techniques

Solution:

Percentage of carbon $=\frac{12}{44} \times \frac{0.535}{0.765} \times 100=19 \%$

Percentage of hydrogen $=\frac{2}{18} \times \frac{0.138}{0.765} \times 100=2 \%$

Percentage of $C:$ Percentage of $H=19: 2$