calculate the mass of each product formed if 10.0 g of the first reactant is reacted with 10.0 g of the second reactant: NCl3 + 3 H2O → 3 HClO + NH3 (Please show me full working out)

This may be your first time to encounter a "limiting reagent" problem. Here is a worked example of such a problem.

http://www.jiskha.com/science/chemistry/limiting_reagent_problem.html