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Question

An inorganic compound contains Carbon 12.6%, Hydrogen 2.13% and Bromine 85.11%. Determine the empirical formula of the compound. [C=12,H=1,Br=80]

A
CH2Br
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B
CH3Br2
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C
C2H2Br
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D
CHBr
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Solution

The correct option is A CH2Br
Let the compound is of 100g
Carbon= 12.6% =12.6g =12.612 =1.05 moles
Hydrogen= 2.13% =2.13g =2.13 moles
Bromine= 85.11% =85.1180 =1.06 moles
nC:nH:nBr= 1.05:2.13:1.06
=1:2:1
Empirical formula= CH2Br

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