Question

A sealed 5.00L flask contains an unknown gas at 1.05 atm and 296 K. How many moles of the unknown gas are in the flask?

Answer 1

Moles of the unknown gas in the flask : 0.216

Further explanation

The gas equation can be written

`\large {\boxed {\bold {PV = nRT}}}`

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

V=5 L

P = 1.05 atm

T = 296 K

`\tt n=(PV)/(RT)\\\\n=(1.05* 5)/(0.082* 296)\\\\n=0.216`