Gas Stoichiometry Practice Problems

The following reaction shows the combustion of octane, C₈H₁₈:

2C₈H₁₈(l) + 25O₂(g) → 16CO₂(g) + 18H₂O(l) 

What is the volume of the carbon dioxide produced at 45.5°C and 1.025 atm if 240 mol of octane combusts?

Consider a reaction of 6.3 mol Al with excess HCl: 

2 Al (s) + 6 HCl (ℓ) → 2 AlCl₃ (s) + 3 H₂ (g)

Calculate the partial pressure of the H2 produced in a vessel with a volume of 10 L at 360 K

Injecting gaseous urea into the combustion mixture reduces NO, which in turn reduced NO₂ emission of a fossiI fuel combustion.

The reaction is shown below: 

2 CO(NH₂)₂(g) + 4 NO(g) + O₂(g) → 4 N₂(g) + 2 CO₂(g) + 4 H₂O(g) 

Consider a vehicle that produces an exhaust with a flow rate of 3.25 L/s at 598 K where the NO partial pressure is 15.6 torr.

Calculate the mass of urea required to react with the NO produced from 10 hours of driving.