1. The problem statement, all variables and given/known data 1.2 x10^23 molecules of a monatomic ideal gas occupies the volume of 0.63 m3 at atmospheric pressure. Find the average translational kinetic energy of one molecule. 2. Relevant equations PV = NRT K = 3/2*kB*T 3. The attempt at a solution T = PV/NR But.. whats N(moles)?