Density of a gas is found to be at and . The molecular weight of the gas is: | Mole Concept and Some Basic Concepts of Chemistry — Chem-Mantra

Question

Density of a gas is found to be $5.46 \text{ g/dm}^3$ at $27^{\circ}C$ and $2 \text{ atm}$. The molecular weight of the gas is:

Answer: A

💡 Solution & Explanation

$M = \frac{dRT}{P} = \frac{5.46 \times 0.0821 \times 300}{2} \approx 67.2 \text{ g/mol}$.

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