The quantity that can differ between the two gases is the mass of each gas.
Explanation:
- Since the pressure, volume, and temperature are the same for both gases, according to the ideal gas law (PV = nRT), the number of moles (n) of each gas can differ, hence the mass can also differ due to the different molar masses of the gases.
- The gas constant (R) is a universal constant and does not change for different gases, as it is the same for all ideal gases.
- The molar volume of an ideal gas at the same conditions of temperature and pressure is equal to the same value (approximately 22.4 L/mol at standard temperature and pressure) for all ideal gases, thus it does not differ in this case.
In summary, the mass can differ, and this difference arises from differences in the molar mass of the gases.
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