For the questions that follow, you will need the following value:
R = 8.31 J mol⁻¹ K⁻¹

Nitrogen consists of molecules N₂. The molar mass of nitrogen is 28 g mol⁻¹. For 100 g of nitrogen, calculate:
a. The number of moles
b. The volume occupied at room temperature and pressure (20 °C; 1.01 × 10⁵ Pa).