Question

Use the given data to calculate the total mass of hydrogen available for fusion over the lifetime of the sun.

Answer 1

Total mass of the Sun = 2x10^30kg 

So 76% of that = (2x10^30kg)*(0.76) = 1.52x10^30kg ----> total amount of Hydrogen if only 12% of that is used for fusion, then (1.52x10^30kg)*(0.12) = 1.82x10^9kg