Q. In a compound and are present in by weight. If molecular weight of the compound is , then the molecular formula of the compound is

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Solution:

Element Element ratio Atomic mass Relative no. of atoms Simplest ratio
Carbon 9 12 3
Hydrogen 1 1 4
Nitrogen 3.5 14 1

Empirical formula of the compound

or,
or,
or,
Molecular formula of the compound