Question

How many molecules are there in 23 moles of oxygen?

Answer 1

Hint: In chemistry, various atoms and molecules react in various ways to form compounds with various properties and structures. The compounds that exist in nature can be similar in many ways based on the properties, method of formation or the structure or orientation. This similarity in property can be used to categorise various compounds and infer various properties of the group as a whole.

Complete step by step answer:
Moles of a material is the amount of matter which contains the $6.022 \times {10^{ - 23}}$ particles. This amount is known as the Avogadro number and is denoted as ${N_A}$. The particles mentioned may be any of the following, atoms, molecules, ions or any of the constituting particles.
Mole is also spelt as mol and is a standard specific unit for measuring large quantities.
A mole is a convenient unit because it helps in an effective representation of the number of particles in the material. The moles of a material can be calculated as the relation given below
$Moles = \dfrac{{mass}}{{molar\; mass}}$
Where the mass is the given mass and the molar mass is the summative weight of all the constituent atoms in the molecule.
Since in one mole of a material, Avogadro number that is $6.022 \times {10^{ - 23}}$ particles are present. So in 23 moles, we will have 23 times the molecules than that present in the amount of 1 mol.
So the number of molecule in 23 moles of oxygen will be $23 \times 6.022 \times {10^{ - 23}}$ particles

The number of molecule in 23 moles of oxygen will be $1.38 \times {10^{ - 21}}$ Particles

Note: The SI unit of the system defines several units as standard as to be used in calculations. But the system of measurements is not just made up of one unit that is used. Several other units that are used and they can be equally converted from one unit to another based on our need. Not all the units are used for the use. Mole is the SI unit of the number of particles.