1. The problem statement, all variables and given/known data the relative concentration by mass of helium at 3 minutes after the big bang is 2-5 parts per 100,000. If you had 1 kilogram of the normal matter from the universe at a time 3 minutes after the big bang, how much of it would be normal helium nuclei? 2. Relevant equations 3. The attempt at a solution I have no idea.can someone help?