A. 200 cm³
B. 400 cm³
C. 600cm³
D. 700cm³
Correct Answer: Option B
B. 400 cm³
Explanation
2H2(g) + O2(g) → 2H2Og
2V IV 2V
600cm³ 300cm³ 600cm³
The volume of hydrogen left over
= 1000 – 600 = 400cm³?
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