The Sun's chemical composition was about 70%% hydrogen when it formed, and about 13%% of this...
The Sun's chemical composition was about 70%% hydrogen when it formed, and about 13%% of this hydrogen was available for eventual fusion in the core. (The rest remains in layers of the Sun where the temperature is currently too low for fusion.)
a) Use the given data to calculate the total mass of hydrogen available for fusion over the lifetime of the Sun.
Homework Answers
Total mass of the Sun = 
Given, 70% of the mass of the sun contains hydrogen gas. So,
total mass of hydrogen present in the sun = 
13% of this mass is available for fusion. So, mass of hydrogen
gas available for fusion, 
Regards
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