1. The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrofluoric acid.

Question

F2(g) + NH3(g) „³ N2F4(g) + HF(g)

a. If you have 66.5g NH3, how many grams of F2 are required for complete reaction?


b. How many grams of NH3 are required to produce 4.65g HF?

c. How many grams of N2F4 can be produced from 225g F2?


2. Lithium nitride reacts with water to form ammonia and aqueous lithium hydroxide.

Li3N(s) + H2O(l) „³ NH3(g) + LiOH(aq)

a. What mass of water is needed to react with 32.9g Li3N?

b. How many molecules of NH3 are produced if 145g of LiOH are also produced?

Answer 1

how to convert moles to molecules (use Avogadro number):
http://www.ehow.com/how_6557465_convert-moles-molecules.html

http://www.jiskha.com/display.cgi?id=1301167744