Question

If 45 moles of NH3 and 50 moles of NO2 react, which one is the limiting reactant ? 8 NH3 (g) + 6 NO2 --> 7 N2 (g) +12 H2O (g)

Answer 1

NH₃ is limiting reactant .

Step-by-step explanation:

Given data:

Number of moles of NH₃ = 45 mol

Number of moles of NO₂ = 50 mol

Limiting reactant = ?

Solution:

Chemical equation:

8NH₃ + 6NO₂ → 7N₂ + 12H₂O

Now we will compare the mole of reactants with products.

NH₃ ; N₂

8 : 7

45 : 7/8×45 = 39.4 mol

NH₃ ; H₂O

8 : 12

45 : 12/8×45 = 67.5 mol

NO₂ ; N₂

6 : 7

50 : 7/6×50 = 58.3 mol

NO₂ ; H₂O

6 : 12

50 : 12/6×50 = 100 mol

Less number of moles of product are formed by the ammonia thus it will be limiting reactant.