What do you understand by the statement ‘vapour density of carbon dioxide is 22’?

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Solution

Step 1:
Vapour density :- It is defined as the mass of a certain volume of a substance divided by mass of same value of hydrogen.
$V a p o u r d e n s i t y = \frac{m a s s o f 1 v o l u m e o f g a s o r v a p o u r}{m a s s o f 1 v o l u m e o f h y d r o g e n}$
Step 2:
Vapour density of carbon dioxide is $22 .$ It means that mass of a certain volume of $C O_{2}$ gas is $22$ times heavier than that of hydrogen.

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