Question 4
Gas LawsWhat volume of oxygen will remain after reacting 8 cm3 of hydrogen with 20 cm3 of oxygen?
- A.10 cm3
- B.12 cm3
- C.14 cm3
- D.16 cm3
Show the answer and explanation
Answer: D (16 cm3)
Explanation
2H2 + O2 → 2H2O, so 8 cm3 of hydrogen uses only 4 cm3 of oxygen. Oxygen left = 20 − 4 = 16 cm3.