Interpretation:
The mass of KMnO4 needs to be determined.
Concept introduction:
By multiplying the molar mass of a compound by the number of moles, the given moles get converted to mass.

Answer to Problem 39PP
Explanation of Solution
The chemical formula for potassium permanganate is
The molar mass of
One mole of potassium atom weighs
One mole of maganese atom
One mole of oxygen (O) atom weigh 16 grams thus, mass of
The molar mass of
Hence one mole of potassium permanganate weighs
Given
Now multiplying the molar mass with the given moles,
Moles to mass is converted by multiplying the given moles by molar mass.
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