Fraction of Element in a Sample

1. A 10.231 g sample of window cleaner containing ammonia was diluted with 39.466 g of water. 4.373 g of this solution was found to require 14.22 mL of 0.1063 M HCl to reach the bromocresol green end-point.

(a) What fraction of the 10.231 g sample of window cleaner was contained in the 4.373 g sample?

(b) How many grams of NH3 were in the 4.373 g sample?

(c) What was the wt% of NH3 in the cleaner?

(d) If the analyst had overshot the end-point by o.o8mL, what would the resulting percentage error have been?