# Molar Mass of Gas Calculator

If you want to determine the number of moles present in gas and its molar mass, you can use our molar mass of gas calculator.

What is the Molar Mass of Gas?

Molar mass, also known as molecular weight, is a mass of a single particle of a gas multiplied by Avogadro's number equivalent to 6.02 x 1023.

**In mathematical form,**

A substance of gas having **1 mol** of mass, also narrated as grams per mole equivalent to the atom's/molecule's mass of **6.022 × 1023**, is known as the **Molar Mass of Gas**.

## Explanation of Molar Mass of Gas Calculator

To find out the molar mass of any gas, you must know the value of the mole, or to find the value of mole, you must know the data listed below;

- Pressure
- Temperature
- Gas' Volume

After having the above data, you can determine the moles' value by using the ideal gas law.

### Formula

To find the value of moles, you can use the modified ideal gas law formula listed below:

Moles = (Pressure * Volume) / (0.0821 * Temperature)

**Whereas** The SI units used in the above values are listed below:

- Volume is equal to Liters (L).
- Temperature is equal to Kelvin (K).
- The pressure is equal to the Atmosphere (atm).

**Moreover,**

**0.0821** is a constant value designed for the above data.

You can now calculate the molar mass of any gas substance by using our molar mass of gas calculator or using the formula listed below.

Molar mass = Mass / Moles

Unit of mass:

Mass is the weight of the gas, and the SI unit used for it is **grams (g)**.

### Example

If a gas having 5.709 moles and the total weight or mass of a gas is 14g, then find out the molar mass of gas.

#### Solution

To solve the problem narrated above, we will use the formula of molar mass.

**Given data**

Moles in gas = 5.709 mol

Mass of a gas = 14g

**To Find**

The molar mass of gas = ?

Molar mass = Mass / Moles

**Putting values**

Molar mass = 14 / 5.709 = 2.4523 g/mol

### Calculator Use

To find out the **molecular weight** of any gas, you can use our **molar mass of gas calculator**. Enter the required value, and the solution will appear on the screen.