At STP, a gas has density 0.50 g/L. Approximately what is its molar mass?

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Multiple Choice

At STP, a gas has density 0.50 g/L. Approximately what is its molar mass?

Explanation:
At STP, one mole of an ideal gas occupies about 22.4 liters. The density given is mass per liter, so the molar mass (mass per mole) equals density times molar volume: M = 0.50 g/L × 22.4 L/mol = 11.2 g/mol. Therefore, the molar mass is approximately 11.2 g/mol.

At STP, one mole of an ideal gas occupies about 22.4 liters. The density given is mass per liter, so the molar mass (mass per mole) equals density times molar volume: M = 0.50 g/L × 22.4 L/mol = 11.2 g/mol. Therefore, the molar mass is approximately 11.2 g/mol.

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