In the reaction of epsom salt and ammonia, how many atoms of hydrogen are in the product, ammonium sulfate (nh4)2so4

Epsom salt is Magnesium sulphate

So the chemical reaction is  

 contains mole of H atoms

That is to find the number of atoms we multiply coefficient subscript number outside the Bracket

1 mole of H atoms contains atoms

So,  

Moving the decimal point to the right, the power of 10 decreases

So, we get  

=  

= atoms is the Answer.

c. 75.7

i think that is the right

thats a little if u want the answer just look it up on google thats what i do haha : )