ICSE Class 10 Chemistry 2023 Solved Paper
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Question : 63
Total: 88
The Empirical formula of an organic compound is CHCl 2
If its relative molecular mass is 168 , what is its molecular formula?
[At. Wt.C = 12 , H = 1 , Cl = 35.5
If its relative molecular mass is 168 , what is its molecular formula?
[At. Wt.
Solution:
Empirical formula of organic compound = CHCl 2
Mass ofCHCl 2
= 12 + 1 + 35.5 × 2
= 84 amu .
Relative molecular mass= 168
Molecular formula=
Multiplication factor( n )
=
=
= 2
Molecular formula= ( Empirical formula ) n
= ( CHCl 2 ) 2 = C 2 H 2 Cl 4
Mass of
Relative molecular mass
Molecular formula
Multiplication factor
Molecular formula
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