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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$$^3$$

### 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.

## 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.