Question

Calculate the number of mole presents in certain mass of gas occupying 6.5dm3 at atm and 15•C. ( R=0.082 atm dm3 K-1 mole-1).

Answer 1

Pressure = 1 atm

temperature = 15⁰C = (273+15)K = 288 K

volume = 6.5 litres

applying ideal gas equation PV=nRT

$\implies$ 1*6.5=n*0.082*288

$\implies$ n=3.63 moles