A $0.15\,\text{g}$ sample of an organic compound is turned into vapour and then takes up a volume of $65.0\,\text{cm}^3$ at $405\,\text{K}$ and $1.00 \times 10^5\,\text{Pa}$. By applying $pV = nRT$, which equation should be used to find the relative molecular mass, $M_r$, of the compound?
- A$\frac{0.15 \times 65 \times 10^{-6} \times 1 \times 10^5}{8.31 \times 405}$
- B$\frac{0.15 \times 8.31 \times 405}{1 \times 10^5 \times 65 \times 10^{-3}}$
- C$\frac{0.15 \times 65 \times 10^{-3} \times 1 \times 10^5}{8.31 \times 405}$
- D$\frac{0.15 \times 8.31 \times 405}{1 \times 10^5 \times 65 \times 10^{-6}}$