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

Answer:

3moles

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

$n=\frac{PV}{RT}$

We know that R=0.082057 $L.atm.K^{-1} .mole^{-1}$

Now

$n=\frac{9\times 8}{0.082057\times 293}$

n=3moles