Question

Gas is contained in a 8.00 L vessel at a temperature of 20.0⁰ and a pressure of 9.00 atm. Determine the number of moles of gas in the vessel. How many molecules are in the vessel?

Answer 1

3moles

Step-by-step explanation:

Given that Volume of the vessel (V)=8L

Pressure of the vessel (P)=9 atm

Temperature of the vessel (T)=20°C=293K (∵K=273+°C )

Now we know that every ideal gas follows

PV=nRT

`n=(PV)/(RT)`

We know that R=0.082057
`L.atm.K^(-1) .mole^(-1)`

Now

`n=(9* 8)/(0.082057* 293)`

n=3moles