Question

Calculate the formula mass of potassium permanganate, kmno4?

1) 127.41 amu
2) 79.41 amu
3) 149.91 amu
4) 174.04 amu
5) 158.04 amu

Answer 1

The formula mass of potassium permanganate (KMnO4) is 158.04 amu.

Step-by-step explanation:

The formula mass of potassium permanganate, KMnO4, can be calculated by adding up the atomic masses of its individual elements. The atomic mass of potassium (K) is 39.10 amu, the atomic mass of manganese (Mn) is 54.94 amu, and the atomic mass of oxygen (O) is 16.00 amu. Multiplying these atomic masses by the number of atoms present in KMnO4 gives:

(39.10 amu × 1) + (54.94 amu × 1) + (16.00 amu × 4) = 39.10 amu + 54.94 amu + 64.00 amu = 158.04 amu.

Therefore, the formula mass of KMnO4 is 158.04 amu.