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What volume of oxygen at s.t.p is required to burn completely 7.5 dm\(^3\) of methane according...

Chemistry
WAEC 2020

What volume of oxygen at s.t.p is required to burn completely 7.5 dm\(^3\) of methane according to the following equation?

CH\(_4\) \(_g\) + 20\(_2\) \(_g\)  → CO\(_2\) \(_g\) + H\(_2\)O\(_g\)

  • A. 3.75 dm\(^3\)
  • B. 7.59 dm\(^3\)
  • C. 15.0 dm\(^3\)
  • D. 30.0dm\(^3\)
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Correct Answer: Option C
Explanation

1 mole of methane reacts with 2 moles of oxygen

1 vol of methane reacts with 2 vol of oxygen

: 7.5  vol of methane will yield 15 vol of oxygen in dm\(^3\)

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