Question

Relation between moles and molecules is given by the formula:
A) 1 mole of the molecule is equal to $6.023\times {{10}^{28}}$ of numbers of molecules.
B) 1 mole of the molecule is equal to $6.023\times {{10}^{23}}$ of numbers of molecules.
C) 1 mole of the molecule is equal to $6.023\times {{10}^{26}}$ of numbers of molecules.
D) 1 mole of the molecule is equal to $6.023\times {{10}^{25}}$ of numbers of molecules.

Answer 1

Hint: The answer to this question is based on the fact that one mole of any molecule contains Avogadro number of molecules and that value leads you to the required answer.

Complete answer:
In the lower classes of general concepts of chemistry, we have studied about the definition that is given for moles, molecules, atoms and also the Avogadro number.
Now, we shall refresh the definitions and thus can relate the terms moles and molecules.
- One mole of a substance is the measure of the amount of a substance according to the International System of Units.
- One molecule is the group of atoms bonded together which represents the small fundamental unit of chemical compound.
- An atom is the smallest particle of a chemical that can exist and which combines with the same or other atoms to constitute a molecule.
- Avogadro number is the constant that is the proportionality factor which relates the number of constituent particles in a sample with the amount of the substance in that sample.
- The S.I. The unit for this constant value is given as $mo{{l}^{-1}}$ and is defined by the symbol ‘N’ or ‘NA’.
Thus, according to this scientist who proposed a law that states that ‘equal volumes of all gases at the same temperature and pressure will have the same number of molecules’ gives the derivation of the total number of molecules present in one mole of a substance.
Thus, the value is $6.023\times {{10}^{23}}$

Therefore, the correct answer is option B).

Note:
Avogadro’s number or Avogadro’s constant is the unit that may constitute electrons, atoms, ions or molecules which is dependent upon the nature of the substance and also the character of the reaction.