Here's how to calculate the molar mass of potassium iodide (KI):

1. Find the atomic masses of the elements:

* Potassium (K): 39.0983 g/mol

* Iodine (I): 126.9045 g/mol

2. Add the atomic masses together:

* 39.0983 g/mol (K) + 126.9045 g/mol (I) = 166.0028 g/mol

Therefore, the molar mass of potassium iodide (KI) is 166.0028 g/mol.