## Best answer

Ideal gas law

## People also ask

### How do you find the molecular weight of an unknown gas?

How would you find the molecular weight of an unknown gas? I would determine the mass of a fixed volume of the gas at a known temperature and pressure and then use the Ideal Gas Law to calculate the molar mass. The mass of an evacuated 255 mL flask is 143.187 g.

### Can you calculate molar mass of a gas?

You can calculate anything, in any order. How to calculate molar mass of a gas? This molar mass of gas calculator is a tool that uses the ideal gas law formula to work out an unknown gas’ molar mass, and the number of moles of it present.

### How to solve for moles of unknown gas?

The temperature in the laboratory is 23 o C and the air pressure is 0.987 atm. Calculate the molar mass of the gas and deduce its formula. Assume the gas is ideal. Step 1: List the known quantities and plan the problem. First the ideal gas law will be used to solve for the moles of unknown gas ( n).

### How do you calculate moles in ideal gas law?

The modified ideal gas law formula: Moles = (Pressure * Volume) / (0.0821 * Temperature) If you want to work it out yourself, without the molar mass of gas calculator, be careful with the units! This particular equation uses a constant of 0.0821, which is intended for the following units: