How to Interconvert Moles, Molarity and Volume

Molarity describes the quantity of molecules per unit volume.
••• Creatas/Creatas/Getty Images

In chemistry and physics a mole describes an amount of a substance in grams equal to its atomic mass. For example, one mole of aluminum has a mass of 13 grams since it has an atomic mass of 13. Also, one mole of a substance contains Avogadro's number of atoms, namely 6.02 times 10 to the power 23. The molarity, or concentration of a solution, equals the number of moles in the solution divided by its volume. Conversion between moles, molarity and volume is performed frequently in science problems.

    Calculate the molarity of a solution in moles per liter, given moles and volume in liters, by dividing the number of moles by the volume. For example, a 5.0 liter solution containing 10.0 moles has a molarity of 2.0 moles per liter.

    Determine the number of moles in a solution, with molarity and volume known, by multiplying molarity in moles per liter by the volume in liters--an example being a 2.0 liter solution with a molarity of 3.0 moles per liter. There are 6.0 moles in the solution.

    Compute the volume of a solution in liters, given the number of moles and molarity, by dividing the number of moles by the molarity in units of moles per liter. For example, a solution containing 6.0 moles and a having a molarity of 3.0 moles per liter has a volume of 2.0 moles per liter.

Related Articles

How to Calculate Particle Concentration
Brine Vs. Conductivity
Characteristics of Aquatic Plants
How to Find the Radius of a Sphere When Given the Volume
Difference Between Density & Mass
How to Test for Acidity With Litmus Paper
How to Calculate Concentration From Density
How to Find the Volume of a Sphere in Terms of Pi
How to Calculate the Henrys in a Coil
How to Calculate Diagonal Distance Between Corners...
Test Your Knowledge on Middle School Science
How to Convert Meter to Liter
Can You Define These Impossible Science Terms?
What Is a Denary Number?
Infrared Vs. Visible Light
What Is a Noble Gas Configuration?
What Is the Comparison Between Atoms & Molecules?
How to Simplify Monomials
Does the Nucleus of an Atom Have Much of an Effect...
How to Find the Cross Sectional Area of a Pipe