Question

A bottle of KMnO4 contains 66.38 g of the compound. How many moles of KMnO4 does it contain?

Answer 1

Answer:0.42 moles

Explanation:

Given:-

Given mass=66.38g

Molecular mass of kmno4 = 158.034g (19+54.9+4*16)

Now we know that ,

No.of moles =given mass/molecular weight

Therefore,

No.of moles =66.38/158.034

No.of moles=0.42 moles