Question

A cylinder of Krypton has contains 17 L of Ar at 22.8 atm and 112 degrees celsisus. How many moles are in the cylinder?​

Answer 1

Given :

A cylinder of Krypton has contains 17 L of Ar at 22.8 atm and 112 degrees Celsius.

To Find :

How many moles are in the cylinder.

Solution :

We know, by ideal gas equation :

$PV = nRT\\\\n = \dfrac{PV}{RT}$

Here, R is gas constant and $R = 8.205 \times 10^{-5} \ m^3\ atm\ K^{-1} mol^{-1}$

Converting all given in required units and putting in above equation, we get :

$n = \dfrac{P\times V}{ R \times T}\\\\n = \dfrac{22.8 \times 0.017}{8.205\times (112+273)}\ moles\\\\n = 1.22 \times 10^{-4} \ moles$

Hence, this is the required solution.