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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 
 Water$$H_2O$$ 
 Carbon dioxide$$CO_2$$ 
 Ethyl alcohol$$C_2H_5OH$$ 
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.

Chemistry

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