Enter the molecular weight (g/mol) and the number of moles into the calculator to determine the Energy from Moles.

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## Energy from Moles Formula

The following equation is used to calculate the Energy from Moles.

**E = mw*n * c^2 / 1000**

Variables:

- Where E is the Energy from Moles (Joules)
- mw is the molecular weight (g/mol)
- n is the number of moles
- c is the speed of light (299792458 m/s)

## How to Calculate Energy from Moles?

The following two example problems outline the steps and information needed in order to calculate the Energy from Moles.

**Example Problem #1:**

- First, determine the molecular weight (g/mol). In this example, the molecular weight (g/mol) is measured to be 13.
- Next, determine the number of moles. For this problem, the number of moles is calculated to be 5.
- Finally, calculate the Energy from Moles using the formula above:

E = mw*n * c^2 / 1000

Inserting the values from above and solving the equation with the imputed values gives:

E = 13*5 * 299792458^2 / 1000 = 5.841908e+15 (Joules)

**Example Problem #2: **

Using the same process as example problem 1, we first define the needed variables outlined by the formula. In this case, the values are provide as:

molecular weight (g/mol) = 40

number of moles = 4

Entering these values into the formula or calculator above gives us: E = 40*4 * 299792458^2 / 1000 = 1.438e+16** **(Joules)