Question

How many atoms are contained in a mole of acetic acid?
(A) $8 \times 6.02 \times {10^{23}}atom{\left( {mol} \right)^{ - 1}}$
(B) $4 \times 6.02 \times {10^{23}}atom{\left( {mol} \right)^{ - 1}}$
(C) $6 \times 6.02 \times {10^{23}}atom{\left( {mol} \right)^{ - 1}}$
(D) None of the above

Answer 1

Mole is one of the important concepts in chemistry which gives information about the amount of substance. Mainly it is used to express a small amount of substance. One mole of a substance consists of $6.02 \times {10^{23}}$ number of atoms or ions or molecules. This number is called Avogadro's number.

Complete answer:
Chemical compounds are classified into acids, bases, and neutral compounds. Some acids are strong, and some others are weak acids, one of the examples for a weak acid is $C{H_3}COOH$ which can be named as ethanoic acid. The common name of ethanoic acid is acetic acid.
As the molecular formula of acetic acid is $C{H_3}COOH$ , it is clear that it has two carbon atoms, two oxygen atoms, and four hydrogen atoms.
Mole is used to express the amount of chemical substance. One mole consists of $6.02 \times {10^{23}}$ number of units, these units may be atoms, or molecules, or ions.
As one mole of acetic acid consists of $8$ atoms and one mole of acetic acid has $6.02 \times {10^{23}}$ number of atoms. Thus, the total number of atoms in one mole of acetic acid will be $8 \times 6.02 \times {10^{23}}atom{\left( {mol} \right)^{ - 1}}$
Option A is the correct one.

Note:
While writing the total number of atoms, in addition to Avogadro's number. The total number of atoms in a given chemical compound must be calculated. As the number of atoms has to be determined, the units must be atoms per mole.