# What is the molecular mass of KMnO4?

#### Understand the Problem

The question is asking for the molecular mass of potassium permanganate (KMnO4). This involves calculating the mass by adding the atomic masses of each element in the compound based on its chemical formula.

158.04 u

The molecular mass of potassium permanganate (KMnO4) is 158.04 u

#### Steps to Solve

1. Write the chemical formula and identify the elements

The chemical formula of potassium permanganate is $KMnO_4$. It consists of potassium (K), manganese (Mn), and oxygen (O).

1. Find the atomic masses of each element

Look up the atomic masses from the periodic table:

• Potassium (K): 39.10 u
• Manganese (Mn): 54.94 u
• Oxygen (O): 16.00 u
1. Multiply the atomic masses by the number of each element in the formula

Calculate the total atomic mass for each element in the compound:

• Potassium: $1 \times 39.10 = 39.10$ u
• Manganese: $1 \times 54.94 = 54.94$ u
• Oxygen: $4 \times 16.00 = 64.00$ u
1. Add the masses to find the total molecular mass

Sum the atomic masses to find the total molecular mass of $KMnO_4$:

$$39.10 + 54.94 + 64.00 = 158.04$$

The molecular mass of potassium permanganate (KMnO_4) is 158.04 u.

The molecular mass of potassium permanganate (KMnO4) is 158.04 u