1. Determine the molar mass of nitrogen gas (N₂):

* The atomic mass of nitrogen (N) is approximately 14 g/mol.

* Nitrogen gas exists as a diatomic molecule (N₂), so its molar mass is 2 * 14 g/mol = 28 g/mol.

2. Use the formula: moles = mass / molar mass

* mass = 35.7 g

* molar mass = 28 g/mol

3. Calculate the moles:

moles = 35.7 g / 28 g/mol = 1.275 moles

Therefore, there are approximately 1.275 moles of nitrogen gas in 35.7 grams.