At STP, one mole of any ideal gas occupies how many liters?

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Multiple Choice

At STP, one mole of any ideal gas occupies how many liters?

Explanation:
The idea here is the fixed molar volume of an ideal gas under standard conditions. Use PV = nRT with one mole at STP, where P is 1 atm and T is 273.15 K. Taking R as 0.0821 L·atm/(mol·K), the volume V is (1)(0.0821)(273.15)/1 ≈ 22.41 L, which rounds to about 22.4 L. So one mole of an ideal gas at STP occupies 22.4 liters. The other numbers reflect different conditions (for example, around room temperature the molar volume is closer to 24 L), so they don’t apply to STP.

The idea here is the fixed molar volume of an ideal gas under standard conditions. Use PV = nRT with one mole at STP, where P is 1 atm and T is 273.15 K. Taking R as 0.0821 L·atm/(mol·K), the volume V is (1)(0.0821)(273.15)/1 ≈ 22.41 L, which rounds to about 22.4 L. So one mole of an ideal gas at STP occupies 22.4 liters. The other numbers reflect different conditions (for example, around room temperature the molar volume is closer to 24 L), so they don’t apply to STP.

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