Enter the total number of moles and the molar mass of the product  (g/mole) into the Theoretical Mass Calculator. The calculator will evaluate and display the Theoretical Mass. 

Theoretical Mass Formula

The following formula is used to calculate the Theoretical Mass. 

TM = #n * mm

  • Where TM is the Theoretical Mass (g)
  • #n is the total number of moles 
  • mm is the molar mass of the product  (g/mole) 

How to Calculate Theoretical Mass?

The following example problems outline how to calculate Theoretical Mass.

Example Problem #1:

  1. First, determine the total number of moles. 
    • The total number of moles is given as: 5.
  2. Next, determine the molar mass of the product  (g/mole). 
    • The molar mass of the product  (g/mole) is provided as: 70.
  3. Finally, calculate the Theoretical Mass using the equation above: 

TM = #n * mm

The values given above are inserted into the equation below and the solution is calculated:

TM = 5 * 70 = 35 (g)


Example Problem #2: 

For this problem, the variables needed are provided below:

total number of moles = 4

molar mass of the product  (g/mole) = 76

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

TM = #n * mm = ?