Here's how to calculate the number of moles in 100 grams of nitrogen gas (N₂):

1. Find the Molar Mass of Nitrogen Gas

* Nitrogen has an atomic mass of approximately 14.01 g/mol.

* Since nitrogen gas exists as a diatomic molecule (N₂), the molar mass is 2 * 14.01 g/mol = 28.02 g/mol

2. Use the Formula

* Moles = Mass / Molar Mass

3. Calculate

* Moles = 100 g / 28.02 g/mol

* Moles ≈ 3.57 mol

Therefore, there are approximately 3.57 moles of nitrogen gas in 100 grams.