Question

Carbon dioxide gas is collected at 27.0(degrees)C in an evacuated flask with a measured volume of 30.0L. When all the gas has been collected, the pressure in the flask is measured to be 0.480atm.

Calculate the mass and number of moles of carbon dioxide gas that were collected. Round your answer to 3 significant digits.

Answer 1

Moles of carbon dioxide gas is 0.584 moles.

Mass of 0.584 moles of carbon dioxide gas is 25.7 g

Step-by-step explanation:

Using ideal gas equation

PV = nRT

where,

P = Pressure of gas =
`0.480 atm`

V = Volume of gas = 30.0 L

n = number of moles of gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas = 27°C = 300.15 K

Putting values in above equation, we get:

`(0.480 atm)* 30.0 L=n* (0.0821L.atm/mol.K)* 300.15K\\\\n=0.5844 mol\approx 0.584`

Moles of carbon dioxide gas = 0.584 moles

Mass of 0.584 moles of carbon dioxide gas = 0.584 mol × 44 g/mol = 25.69 g ≈ 25.7 g