Chemistry - Mole Concept Question with Solution | TestHub

$44$ grams of ${\mathrm{CO}}_2$ contain $12$ grams of carbon.

Hence, one gram of carbon dioxide contain $\frac{12}{44}$ gram of carbon.

$0.792$ gram of carbon dioxide contain $\frac{12}{44} \times 0.792$ gram of carbon

Percentage of carbon = $\frac{\text{Mass of carbon}}{\text{Mass of organic compound}} \times 100$

$= \frac{12}{44} \times \frac{0.792}{0.492} \times 100$

$= 43.90\%$

So, answer is $44$.