What volume of hydrogen would be left over when 300cm3 of oxygen and 1000cm of…

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Chemistry WAEC 2004

What volume of hydrogen would be left over when 300cm3 of oxygen and 1000cm of hydrogen are exploded in a sealed tube? [2H2(g) + O2(g) → 2H2 Og]

  • 200 cm3
  • 400 cm3 checkmark
  • 600cm3
  • 700cm3

The correct answer is: B

Explanation

2H2(g) + O 2(g) → 2H2Og
2V IV 2V
600cm3 300cm3 600cm3
The volume of hydrogen left over
= 1000 - 600 = 400cm3?
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