* Look up the atomic masses:

* Nitrogen (N): 14 g/mol

* Oxygen (O): 16 g/mol

* Multiply each atomic mass by the number of atoms in the formula:

* Nitrogen (N): 14 g/mol * 1 = 14 g/mol

* Oxygen (O): 16 g/mol * 2 = 32 g/mol

* Add the masses together: 14 g/mol + 32 g/mol = 46 g/mol

Therefore, the molar mass of nitrogen dioxide (NO₂) is approximately 46 grams per mole.