Question

A compound contains 12.76% carbon,21.3% of hydrogen and 85.11% bromine. what is molecular formula ?
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Answer 1

Explanation:

Divide the percentages with atomic masses-

carbon

12

12.8

1.06 1

Hydrogen

1

2.1

2.1 2

Bromine

79.9

85.1

1.06 1

Empirical formula- CH

2

Br

(Empirical formula wt)

n

=188 or (94)

n

=188 or n=2

So molecular formula will be - (CH

2

Br)

2

=C

2

H

4

Br

2

Answer 2

Answer:

Refer Textbooks once again