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Question

Symbolic representation of an actual number of atoms present in a molecule is called:

A
empirical formula
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B
molecular formula
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C
structural formula
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D
none of these
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Solution

The correct option is B molecular formula
The number of atoms of each element in a compound is given by the molecular formula. For example:

CompoundChemical Formula
WaterH2O
Carbon dioxideCO2
Ethyl alcoholC2H5OH
By looking at the molecular formula of water, one can understand it has 2 atoms of hydrogen and 1 atom of oxygen. Similarly, other compounds also have a fixed number of atoms which is understood by the molecular formula.

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