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Mole Concept

The mass of ...

Question

The mass of $C O_{2}$ present in 2.8 litres at STP condition is:
[C=12, O=16]

5.5 g

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44 g

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22.5 g

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2.8 g

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Solution

The correct option is B 5.5 g
As we know, one mole of a gaseous substance at STP occupies 22.4 litres.

So mass of 2.8 litres of $C O_{2} = 2.8 \times \frac{44}{22.4} = 5.5 g m$

Hence, option $A$ is correct.

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