Question

What is the mass percent of carbon in carbon dioxide?

पर्याय

• 0.034%

• 27.27%

• 3.4%

• 28.7%

Answer 1

27.27%

Explanation:

Molecular mass of $$\mathrm{CO}{\phantom{A}}_2$$ = 1 × 12 + 2 × 16 = 44 g

1 g molecule of $$\mathrm{CO}{\phantom{A}}_2$$ contains 1 g atom of carbon

44 g of $$\mathrm{CO}{\phantom{A}}_2$$ contains C = 12 g of carbon

% of C in $$\mathrm{CO}{\phantom{A}}_2$$ = ${\displaystyle \frac{12}{44}\times 100}$ = 27.27%

Hence, the mass per cent of carbon in $$\mathrm{CO}{\phantom{A}}_2$$ is 27.27%.