Question

gases under pressure quick check
two balloons hold two different gases. the gases are held at the same pressure, volume, and temperature. which quantity can differ between the two gases? (1 point)

• the molar volume of each gas
• the number of moles of each gas
• the mass of each gas
• the gas constant of each gas

Explanation:

According to the ideal - gas law $PV = nRT$, when $P$, $V$, and $T$ are the same, the number of moles $n$ is the same for both gases. Molar volume is a constant at a given $T$ and $P$. The gas constant $R$ is also a universal constant. But different gases have different molar masses $M$, and since $m=nM$ (where $m$ is mass), the mass of each gas can differ.

Answer:

the mass of each gas