For this question, assume that the vapour acts as an ideal gas. $0.175\,\text{g}$ of a volatile liquid forms a vapour with volume $4.50 \times 10^{-5}\,\text{m}^3$ at $100\,^\circ\text{C}$ and pressure $1.013 \times 10^5\,\text{Pa}$. Determine the $M_r$ of the liquid.
- A31.9
- B87.1
- C119
- D127