1. The problem statement, all variables and given/known data 1.5 is a typical walking speed. At what temperature would nitrogen molecules have an rms speed of 1.5 ? 2. Relevant equations V=(3*K_b*T/m)^.5 V is the rms speed K_b is Boltzmann's constant T is temp in kelvin m is mass 3. The attempt at a solution I am going to make the foolish assumption that when they mean mass, they mean the mass of one nitrogen molecule. So the mass of a proton and a neutron is 1.67E-27kg and the mass of an electron is 9.11E-31kg. One nitrogen atom has 7 protons, 7 neutrons and 7 electrons and multiply that by two because of the second nitrogen atom. So ((1.67E-27)(14)+(7)(9.11E-32))(2)=4.677E-26 kg. Now I rearrange my equation to solve for T and plug in. mV^2/(3*K_b)=T (4.677E-26)(1.5)^2/(3*K_b) = .0025 kelvin Am I close? Thanks!