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Calculate the volume of oxygen required to burn completely 20cm of carbon (II) o...


Question

Calculate the volume of oxygen required to burn completely 20cm of carbon (II) oxide.

Options

A) 10cm\(^3\)

B) 20cm\(^3\)

C) 30cm\(^3\)

D) 40cm\(^3\)

The correct answer is A.

Explanation:

\(2CO + O_2 \rightarrow 2CO_2\)
2 volumes + 1 volume \(\rightarrow\) 2 volumes
According to the mole-volume relationship, 2 volumes of CO combine with 1 volume of \(O_2\). Thus, 20cm\(^3\) of CO will combine with 10cm\(^3\) of \(O_2\) i.e. the relationship 2:1.

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Dicussion (1)

  • \(2CO + O_2 \rightarrow 2CO_2\)
    2 volumes + 1 volume \(\rightarrow\) 2 volumes
    According to the mole-volume relationship, 2 volumes of CO combine with 1 volume of \(O_2\). Thus, 20cm\(^3\) of CO will combine with 10cm\(^3\) of \(O_2\) i.e. the relationship 2:1.

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