In order to go about this question you must do the following:
Calculate the molar mass of ammonia from the periodic table
calculate the molar mass of nitrogen trichloride from the periodic table
Write a balanced chemical equation: NCl3 + 3H2O → NH3 + 3HOCl
convert 1.33 g NCL3 into moles NCL3 using the molar mass calculated in step 2; then use the balance chemical equation in step 3 to convert moles of NCL3 into moles of NH3; then convert moles of NH3 into grams of NH3 produced by using the molar mass calculated in step 1.
(1.33g NCL3/mmNCL3)(mol NH3/mol NCL3)(mm NH3) = grams of NH3 produced.