Question 6
Gas Laws2H2(g) + O2(g) → 2H2O(g)
In the reaction above, what volume of hydrogen would be left over when 300 cm3 of oxygen and 1000 cm3 of hydrogen are exploded in a sealed tube?
- A.200 cm3
- B.400 cm3
- C.600 cm3
- D.700 cm3
Show the answer and explanation
Answer: B (400 cm3)
Explanation
Hydrogen and oxygen react 2 : 1 by volume, so 300 cm3 O2 uses 600 cm3 H2; 1000 − 600 = 400 cm3 is left.