Question 6
AirWhat is the approximate volume of air containing 10cm3 of oxygen?
- A.25cm3
- B.20cm3
- C.100cm3
- D.50cm3
Show the answer and explanation
Answer: D (50cm3)
Explanation
Air is about one-fifth (20%) oxygen, so 10 cm3 of oxygen is in about 5 × 10 = 50 cm3 of air.