Question

Calculator the molecular mass of potessiumte (kmno4).Atomic masses :k = 39.0umn =55.0 u,0= 16.0 u.

Answer 1

Hi, please consider the answer given below;

Potassium permanganate, KMnO4 has the following elements;

Potassium- atomic mass = 39

Manganese - atomic mass = 55

Oxygen atomic mass = 16 x 4 = 64

So the total mass gives the molecular mass of the compound.

Molecular mass = 39 + 55 + 64 = 158.

Answer 2

Chemical formula of the Potassium Permanganate is KMnO₄.

Molar masses of the each element is given in the question, K = 39 u, Mn = 55 u and O = 16 u.

Therefore, Relative molecular masses = Masses of each element in a compound

= 39 + 55 + 16 × 4

= 94 + 64

= 158 u.

This is the required molar mass of the Potassium Permanganate.

Hope it helps.