Computer Program: In the primordial universe, hydrogen made up about 74% of the available gas, while helium made up the remaining 26% (we'll ignore the trace amounts of lithium and berylium that were also present).
As the universe cooled, the hydrogen combined to form clouds of molecular hydrogen and helium.
Plot the Jeans mass as a function of cloud radius for three temperatures: T = 10 K, T = 100 K and T = 1000 K. Your X-axis should cover everything from planetary scales to extra-galactic scales (a semi-log plot may show your results more clearly).