1) C
2) B
3) A/B not sure
4) C I think
I assume about 5 atoms are in one molecule of this product
Multiply 10.49 by 12.993. that should be it. 130 grams ish?
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.
4 mol NH₃ → 5 mol N₂
x mol NH₃ → 0.824 mol N₂
x=0.824*4/5=0.6592 mol