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Grams to Moles Calculator

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Grams to moles calculator will help to convert grams to moles of a substance. Grams gives you the practical value and moles gives you the theoretical value. The formula to convert grams into moles is given as,

Grams to moles = $\frac{Mass}{Formula \ weight}$.

Plugin the mass of the substance in grams and formula weight of the substance into the gram to moles calculator to get the amount of substance in moles.
 

Steps

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Steps to convert grams to moles of a substance :

Step 1 : Jot down the given mass of the substance from the question.

Step 2 : From the periodic table, find the formula weight of the given substance.

Step 3 : Plugin the mass and the formula weight into the formula given and get the amount of substance in moles.

Problems

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Below are some of the solved problems to help to to convert grams to moles of a substance.

Solved Examples

Question 1: Determine the number of moles in 30 gram of KMnO$_{4}$.
Solution:
 
Given : Mass of KMnO$_{4}$ = 30 gram

Formula weight of KMnO$_{4}$ = 39.0983 + 54.938049 + 15.9994 $\times$ 4 = 158.034 g/mol

Mass of KMnO$_{4}$ in moles = $\frac{Mass}{Formula \ weight}$

Mass of KMnO$_{4}$ in moles = $\frac{30}{1580.34}$

Mass of KMnO$_{4}$ in moles = 0.0189 moles
 

Question 2: Determine the number of moles in 12 gram of FeCl$_{3}$.
Solution:
 
Given : Mass of FeCl$_{3}$ = 12 gram

Formula weight of FeCl$_{3}$ = 55.845 + 35.453 $\times$ 3 = 162.204 g/mol

Mass of FeCl$_{3}$ in moles = $\frac{Mass}{Formula \ weight}$

Mass of FeCl$_{3}$ in moles = $\frac{12}{162.204}$

Mass of FeCl$_{3}$ in moles = 0.0739 moles