Dinitrogen monoxide gas is collected at 19.0 °C in an evacuated flask with a measured volume of 30.0 L. When all the gas has been collected, the pressure in the flask is measured to be 0.500 atm. Calculate the mass and number of moles of dinitrogen monoxide gas that were collected.

The mass of dinitrogen monoxide gas that is collected is 27.6 grams

Explanation:

Step 1: Data given

Molar mass of N2O = 44.013 g/mole

Temperature = 19.0 °C = 292 Kelvin

volume of the gas = 30.0 L

Pressure of the gas = 0.500 atm

Gasconstant = 0.08206 L*atm/K*mol

Step 2: Calculate number of moles

via the ideal gas law:

P*V = n*R*T

n = (P*V) / (R*T)

n = (0.500 atm * 30.0 L) / (0.08206 L*atm/K*mol * 292 K)

n = 0.626

Step 3: Calculate mass of dinitrogen monoxide

mass = number of moles * Molar mass

mass of N2O = 0.626 moles * 44.013 g/mole

mass of N2O = 27.6 grams

The mass of dinitrogen monoxide gas that is collected is 27.6 grams