A tube from which the air has been removed has a volume of $400\,\text{cm}^3$. When it is filled with a gas at $300\,\text{K}$ and $101\,\text{kPa}$, its mass rises by $0.65\,\text{g}$. Take the gas to obey the ideal gas law. State the identity of the gas.
- Aargon
- Bhelium
- Ckrypton
- Dneon