How many atoms of nitrogen (N) on in (NH3)3PO4

Can someone me with these questions plz.

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.