1. Identify the Elements:

* Ammonia (NH3) contains nitrogen (N) and hydrogen (H).

2. Look Up Atomic Masses:

* Find the atomic masses of nitrogen and hydrogen on the periodic table:

* Nitrogen (N): 14.01 g/mol

* Hydrogen (H): 1.01 g/mol

3. Multiply by Subscripts:

* Ammonia has one nitrogen atom (N) and three hydrogen atoms (3H).

* Multiply the atomic mass of nitrogen by 1: 14.01 g/mol * 1 = 14.01 g/mol

* Multiply the atomic mass of hydrogen by 3: 1.01 g/mol * 3 = 3.03 g/mol

4. Add the Results:

* Add the results from step 3: 14.01 g/mol + 3.03 g/mol = 17.04 g/mol

Therefore, the molar mass of NH3 (ammonia) is 17.04 g/mol.