## Best answer

An unknown gas has a mass of 153 g and occupies 15.0 L at a temperature of 300.0 K and a pressure of 2.00 atm. What is its molar mass?M = 153g 鈰?0.082 L鈰卆tm K鈰卪ol 鈰?300.0K 2.00atm 鈰?15.0L = 125 g/mol

## 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 determine the molar mass of an unknown solute?

We can use a measurement of any one of the following properties to determine the molar mass (molecular weight) of an unknown that is the solute in a solution: Boiling Point Elevation Freezing Point Depression Osmotic Pressure From Boiling Point Elevation

### How do you calculate molar mass from Avogadro’s number?

Since we know that 6.022 鈰?1023 represents Avogadro’s number, and is the equivalent of 1 mole, we can describe molar mass as being equal to M = m n, where m – the gas’ mass in grams; n – the number of moles of gas;