Question

if the vapour density of a compound is 252, its molecular formula is ?
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Answer 1

Explanation:

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Answer 2

Given: The vapour density of a compound is 252 and the compound is $CBr_3$.

To find: We have to find its molecular formula.

Solution:

The relative mass of a compound is multiple of vapour density with 2.

Relative mass= 252×2

=504

Emperical mass of $CBr_3$ is=12+80×3=252

n=$\dfrac{504}{252}=2$

So, molecular formula of the compound is $(CBr_3)_2$ or $C_2Br_6$.