* Find the atomic masses of nitrogen and oxygen:

* Nitrogen (N): 14.01 g/mol

* Oxygen (O): 16.00 g/mol

* Multiply the atomic mass of each element by its subscript in the formula:

* Nitrogen (N): 14.01 g/mol * 1 = 14.01 g/mol

* Oxygen (O): 16.00 g/mol * 2 = 32.00 g/mol

* Add the results together to find the molar mass:

* 14.01 g/mol + 32.00 g/mol = 46.01 g/mol

Therefore, the molar mass of nitrogen dioxide (NO₂) is 46.01 g/mol.