How do you find a theoretical mass? is there a difference between theoretical mass and theoretical yield?

Theoretical yield is the quantity of a product obtained from the complete conversion of the limiting reactant in a chemical reaction. It is the amount of product resulting from a perfect chemical reaction and thus not the same as the amount you'll actually get from a reaction.

your answer is c) plasma

~*"auba14"*~

it's c (engineer's do their work with mechanical stuff not on any living being)