Enter the mass of a substance and its molar mass into the calculator to determine the number of moles. This calculator helps in converting mass to moles for chemical substances based on their molar mass.
Mass to Moles Formula
The following formula is used to convert mass to moles.
n = m / M
Variables:
- n is the number of moles (mol)
- m is the mass of the substance (grams)
- M is the molar mass of the substance (g/mol)
To convert mass to moles, divide the mass of the substance by its molar mass.
What is Molar Mass?
Molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol). It is equivalent to the molecular weight of a substance, where each atomic mass unit (amu) is equal to 1 g/mol. The molar mass is used to convert between the mass of a substance and the amount in moles, which is a fundamental concept in chemistry for stoichiometric calculations.
How to Calculate Moles from Mass?
The following steps outline how to calculate the number of moles from mass.
- First, determine the mass of the substance (m) in grams.
- Next, determine the molar mass of the substance (M) in grams per mole.
- Use the formula from above = n = m / M.
- Finally, calculate the number of moles (n).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
mass of the substance (m) = 50 grams
molar mass of the substance (M) = 18.015 g/mol (water)