Question

Number of electrons in one mole of hydrogen molecule is:
(A) $6.023 \times {10^{23}}$
(B) $12.046 \times {10^{23}}$
(C) $3.0115 \times {10^{23}}$
(D) Indefinite

Answer 1

Firstly we should be clear what exactly is the mole and the mole concept. Now we know that Mole is considered as the unit of measurement which is used for the amount of substance in the International System of Units which is called SI units. So here we get the atoms in one mole then we can multiply it by an electron in one molecule to get the answer.

Complete step-by-step solution:
Firstly we should be aware of the concept of the mole which is known as mole concept.
So the basic interpretation of the mole as per the scientific terms is:
Mole is considered as the unit of measurement which is used for the amount of substance in the International System of Units which is called SI units. The symbol which is used for representing mole is mol. Also we can say that a mole of a substance or a mole of any kind of particle is defined as exactly $6.023 \times {10^{23}}$ particles, which may be atoms, molecules, ions, or electrons.
Now coming to the question we get that:
$1$ mole of ${H_2}$ will contain $6.023 \times {10^{23}}$ molecules and each molecule of ${H_2}$ contains two electrons.
Now this will double the amount of electrons which would be $2 \times 6.023 \times {10^{23}} = 12.046 \times {10^{23}}$.

Therefore the correct option is option (B), $12.046 \times {10^{23}}$.

Note: The mole may also be used to represent the number of atoms, ions, electrons, or other entities. The concentration of a solution is commonly expressed by its molarity, defined as the amount of dissolved substance per unit volume of solution, for which the unit typically used is moles per litre (mol/l), commonly abbreviated M.