Nitric oxide is made from the oxidation of ammonia.........?

Question

Nitric oxide is made from the oxidation of ammonia. How many moles of nitric oxide can be made from the reaction of 3.80 mol NH3 with 5.15 mol O2?

4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

a.4.12 mol
b.6.44 mol
c.5.15 mol
d.8.95 mol
e.3.80 mol

Answer 1

e.3.80 mol

Answer 2

First find the limiting reactant. What will run out first: NH3 or O2.

3.80molNH3 x 5molO2/4molNH3 = 4.75molO2.

So you need 4.75 moles O2 to react with 3.80 moles NH3. You have 5.15 moles O2, more than enough. So NH3 is the limiting reactant. Go with that.

3.80molNH3 x 4molNO/4molNH3 = 3.80mol NO