Question 32
Gas LawsCalculate the minimum volume of oxygen needed for the complete combustion of a mixture of 10cm3 of CO and 15cm3 of H2.
- A.25.0cm3
- B.10.0cm3
- C.12.5cm3
- D.5.0cm3
Show the answer and explanation
Answer: C (12.5cm3)
Explanation
2CO + O2 → 2CO2 needs 5 cm3 O2 for 10 cm3 CO; 2H2 + O2 → 2H2O needs 7.5 cm3 for 15 cm3 H2. Total = 12.5 cm3.