Question

How many molecules are in 3.0 moles of carbon dioxide?

Answer 1

Hint: In order to find the solution to this question, we have to multiply the given number of moles by Avogadro’s number. The mole is a unit of measurement for an amount of the substance in a system unit that is not standard but international.

Complete answer:
- A mole is a physical quantity which represents the amount of mass of the substance required to have a collective of atoms $6.022\times 10^{23}$ of the given substance.
- Mole is widely used for units that calculate the amount of the matter of substance. One mole of every substance weighs about the same as the molecular mass of the similar substance.
- Avogadro’s number of 6.022\times 10^{23} molecules per moles is used to calculate the number of molecules. It represents the number of atoms or molecules or entities present in one mole of a substance.
- The Avogadro’s law established how the gas amount (n) is related to its volume (v). a direct relationship is implied that the gas volume is completely proportional to the amount of gas moles present in it.
- In the question, we were given a number of moles of carbon dioxide. To find out the number of molecules, we will multiply the number of moles to Avogadro’s number.
$3\times 6.066\times 10^{23}= 18.066\times 10^{23}$

Note:
The mole concepts simplify mass relation among reactants and products like we can have base and our calculation on coefficient number of molecules involved in reaction. At the same time mass of substances are on a lab scale unit.