Two moles of an ideal gas occupy what volume at standard temperature and pressure?
Correct answer: B. 44.8 dm3
- A. 22.4 dm3
- B. 44.8 dm3
- C. 11.2 dm3
- D. 24 dm3
Explanation
One mole occupies 22.4 dm3 at STP, so two moles occupy twice that, which is 44.8 dm3. This follows from Avogadro's law, that equal volumes of gases contain equal numbers of molecules under the same conditions. The identity of the gas makes no difference, which is what students most often doubt.
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About Ideal Gas Equation
The ideal gas equation, PV = nRT, relates pressure, volume, amount and absolute temperature when gas particles are assumed to have negligible volume and no intermolecular forces. Applications include finding molar mass, density or an unknown gas variable, with careful use of Kelvin temperature and consistent units, and comparison with real-gas behaviour.
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443 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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