What Is A Mole In Chemistry?

A mole is a unit of measurement. It is one of the seven base units in the International System of Units (SI).

SI units were invented when the existing units were found inadequate. The chemical reactions taking place and measured at the levels using grams wouldn’t make sense yet confusing. So, to bridge the gap between very large and very small numbers, the mole was invented.

Mole refers to the SI unit used to measure the amount of any substance, and the abbreviation used for a mole is mol.

It is essential to note that one mole equals 6.02214076 X 1023 particles.

And the particle here could be anything small, including atoms, electrons, or any small like an elephant.

Why do we use moles?

We simply do not stick to the grams or others and choose moles because it provides us a consistent method to convert between molecules or atoms and grams.

Now that we have mentioned the conversions let us see how we can convert moles into grams.

For instance,

How many Carbon Dioxide grams are 0.2 moles of CO2?

Let us first take the atomic masses of Oxygen and carbon.

Carbon has 12.01 grams per mole, and Oxygen has 16.00 grams per mole.

As one molecule of CO2 contains one carbon atom and 2 Oxygen atoms.

So,

Number of grams per mole CO2 = 12.01 + (2 X 16.00)

= 12.01 + 32.00

= 44.01 gram per mole

Now simply multiply this number of grams per mole times the number of moles

Grams in 0.2 moles of CO2 = 0.2 moles X 44.01 grams per mole

Therefore, Grams in 0.2 moles of CO2 = 8.80 grams.

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