What is the molar mass of a gas if 18.0 L of the gas at STP has a mass of 41.6 grams?

Name: What is the molar mass of a gas if 18.0 L of the gas at STP has a mass of 41.6 grams?
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Quizplus · Accepted Answer

The molar volume of a gas at STP (Standard Temperature and Pressure) is 22.4 L/mol. To find the molar mass, you divide the mass of the gas by the volume it occupies at STP, and then multiply by the molar volume. Here, $ \frac{41.6 \, \text{g}}{18.0 \, \text{L}} \times 22.4 \, \text{L/mol} = 51.8 \, \text{g/mol} $.

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