Question

A mixture of gases contains $H_2\left(g\right)$ and $O_2\left(g\right)$ in the ratio of $1:4\left(w/w\right)$. What is the molar ratio of the two gases in the mixture?

• A. $4:1$
• B. $16:1$
• C. $8:1$
• D. $1:4$

Answer 1

The correct option is A $4:1$

$\frac{w_{H_2}}{w_{O_2}}=\frac{1}{4}\Rightarrow \frac{n_{H_2}}{n_{O_2}}\Rightarrow \frac{\frac{w_{H_2}}{M_{H_2}}}{\frac{w_{O_2}}{M_{O_2}}}=\frac{\frac{1}{2}}{\frac{4}{32}}=\frac{4}{1}$

Hence, the correct answer is option (a).