You have two flasks of equal volume. Flask A contains hydrogen gas (H2) at 0°C and 1 atm of pressure. Flask B contains CO2 gas at 25°C and 2 atm pressure. 

a) What is the ratio of the average kinetic energy per molecule of H2/CO2? 

b) What is the ratio of the average kinetic velocity of H2/CO2 molecules? 

c) What is the ratio of the number of molecules of CO2/H2? 

d) What is the mass ratio of CO2/H2?