Two moles of an ideal gas occupy what volume at standard temperature and pressure?
- 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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