text: ammonia is formed by the reaction    3h2 + n2 ---> nh3 (ammonia)? a. how many liters of ammonia at stp are formed when 25 l of n2 at stp react with h2.   b. how many liters of h2 at 25 centigrade and 1 atm are needed to react with 398l of n(2) centigrade and 1 atm.   c.how many liters of nh3 at stp are formed when 9.56l of n2 at stp reacts with 27.1 l of h2 at stp (this is a limiting reactant problem)    this problem gave me the fluxxxx.  i worked it through though...let's see if you can. the balanced chem. equation is:  3h2(g) + n2(g)  --> 2nh3(g)  a.  1 l of n2 gives 2 l of nh3 at stp 25 l of n2 gives 2*25 = 50 l of nh3 measured at stp.  b. i suppose that n2 is also at 25 oc.  1 l of n2 reacts with 3 l of h2 398 l of n2 reacts with 3*398 = 1194 l of h2.  c.  1 l of n2 reacts with 3 l of h2 9.56 l of n2 reacts with 3*9.56 = 28.68 l h2  but we have 27.1 l < 28.68 l of h2. so h2 is the limiting reagent ant reacts fully:  3 l of h2 gives 2 l of nh3 27.1 l of h2 gives 2*27.1/3 = 18.67 l of nh3