This a screenshot of my computer with one of the programs running that I started out working on this summer. The line dividing the blue and orange sections is the escape velocity of Titan. in the upper left corner on the command prompt you can see on the bottom the fraction of hydrogen molecules that would escape from Titan's atmosphere each second. So obviously their isn't any hydrogen in Titan's atmosphere. When you run the program for Jupiter however, the fraction escaping is 0.00000000000... This stuff helped me learn some programming and basic atmospheric principles at the same time.