The vapour density of a mixture of and is 38.3. The mole fraction of in the mixture is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
The vapour density of a mixture of $NO_2$ and $N_2O_4$ is 38.3. The mole fraction of $NO_2$ in the mixture is:
Answer: A
💡 Solution & Explanation
$\text{M}_{avg} = 2 \times 38.3 = 76.6$. <br>$76.6 = 46x + 92(1-x) \Rightarrow 76.6 = 46x + 92 - 92x \Rightarrow 46x = 15.4 \Rightarrow x \approx 0.334$.
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