How many moles in 100 grams of KOH?

Question

How many moles in 100 grams of KOH

Answer 1

Divide the given mass by the molecular weight of KOH and that will be the number of moles.

 

Atomic weights:

 

K - 39.1 g/moles

O - 16.0 g/mole

H - 1.01 g/mole

 

Add these up to get the molecular weight of KOH

 

39.1 + 16.0 + 1.01 = 56.11 g/mole

 

moles present = (100 g) / (56.11 g/mole) ≅ 1.78 moles