What is the molecular mass of KCl?

The molecular mass of potassium chloride (KCl) is calculated by adding the atomic masses of potassium (K) and chlorine (Cl).

• Atomic mass of potassium (K) = 39 u
• Atomic mass of chlorine (Cl) = 35.5 u

Molecular mass of KCl = 39 + 35.5 = 74.5 u

Therefore, the molecular mass of KCl is 74.5 atomic mass units (u).

This value is commonly used in chemistry for calculations such as molar mass, stoichiometry, and preparing solutions.