What is empirical formula give an example ? For a compound whose empirical formula and molecular formula are same, give an example.

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Solution

Empirical formula $\to$ It is the simplest formula of a compound which gives a ratio of different atoms present in one molecule of the compound.
E.g.- One molecule of ethylene (molecular formula $C_{2} H_{4}$ ) contains two atoms of carbon and four atoms of hydrogen. Its empirical formula is $C H_{2}$ .
Carbon monoxide has same empirical formula and molecular formula.
Carbon monoxide $(C O)$ has carbon and oxygen atoms in the ratio $1 : 1$ thus it is already as simple as it can be, and the empirical formula is $C O$ , the same as the molecular formula.

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