Final answer:
The molar mass of KNO3 is calculated by summing the atomic masses of potassium (K), nitrogen (N), and oxygen (O), which results in a molar mass of 101.10 g/mol.
Step-by-step explanation:
To determine the molar mass of KNO3, you need to add together the atomic masses of potassium (K), nitrogen (N), and oxygen (O). The atomic mass of K is 39.10 g/mol, N is approximately 14.01 g/mol, and each O is about 16.00 g/mol. Since there are three oxygen atoms in KNO3, you would multiply the atomic mass of oxygen by three and add it to the masses of potassium and nitrogen to get the total molar mass of KNO3.
Here is the calculation:
Molar mass of KNO3 = Atomic mass of K + Atomic mass of N + 3 × Atomic mass of O
Molar mass of KNO3 = 39.10 g/mol + 14.01 g/mol + 3 × 16.00 g/mol
Molar mass of KNO3 = 39.10 g/mol + 14.01 g/mol + 48.00 g/mol
Molar mass of KNO3 = 101.10 g/mol