State the Ideal Gas Law and identify the standard molar volume of an ideal gas at STP (0°C, 101.3 kPa).

解説

$P$ is pressure, $V$ is volume, $n$ is amount in moles, $R \approx 8.314 \text{ J}/(\text{mol}\cdot\text{K})$ is the universal gas constant, and $T$ is absolute temperature in kelvins.