Answer
C. $T_{helium} < T_{nitrogen}$
Work Step by Step
The ideal gas law can be rewritten to derive T:
$$T = \frac{pV}{nR}$$
Pressure ($p$) and volume ($V$) are the same for both containers. However, $n$, or the amount of gas molecules, inside each container is different. The containers have equal mass, but since nitrogen gas has a higher molecular mass than that of helium gas (28 > 4), there are more moles of helium inside a container than moles of nitrogen inside the other. Thus the container with helium has a lower temperature, since $n$ is inversely proportionate to $T$.
