Two identical bottles contain the same number of molecules at ambiant conditions of temperature and pression.The first contains N2, and the second CO2.Tell if the it's true/false and explain why The molecules of CO2 have more kinetic energy than the molecules of N2. My answer : False because if we consider the mass of each sort of molecules, we see clearly that a molecule of N2 is 28,02 of mass unit while CO2 is 44,01 mass unit. The latter having a bigger mass, it clearly goes at a lower speed, which results in having less kinetic energy. Would this justification be any good ??? Thank you!