A 5-liter mixture of CO and CO₂ reacts with excess carbon at high temperature to form CO only. The final volume is 7 liters. What was the volume of CO₂ in the initial mixture?
- 2 liters
- 3 liters
- 1 liter
- 4 liters
📝 Detailed explanation
CO₂ + C → 2COFor every 1 vol of CO₂, 2 vol of CO are produced (increase of 1 volume).
Total increase = 7 - 5 = 2 liters.
Therefore, the initial volume of CO₂ was 2 liters.