Question

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)
o the gas constant of each gas
o the mass of each gas
o the number of moles of each gas
o the molar volume of each gas

Explanation:

According to the ideal - gas law $PV = nRT$, when $P$, $V$, and $T$ are the same, $n$ (number of moles) is the same. Gas constant $R$ is universal. Molar volume is the same under same $P$ and $T$. But different gases have different molar masses, so mass can differ.

Answer:

the mass of each gas