# What is the number of atoms in one mole of carbon atoms?

May 13, 2018

Is it twelve?

#### Explanation:

No it is slightly more than that .... it is $\text{Avogadro's number}$, $6.02214 \times {10}^{23}$. One mole of ""^12C atoms has a mass of $12.00 \cdot g$ PRECISELY. And this is why we use the mole in chemical calculations ... it is a link, a bridge, between the submicro world of atoms and molecules, about which we theorize, to the macro worlds of grams, and litres, that which we can measure on a laboratory bench.

It is worth spending some time digesting this, because the mole is absolutely vital and fundamental to every chemical equation.... And so we could easily quote the mass of a SINGLE carbon atom with these data...i.e.

$\text{mass of ONE carbon atom} = \frac{12.0 \cdot g \cdot m o {l}^{-} 1}{6.0224 \times {10}^{23} \cdot m o {l}^{-} 1} = 1.99 \times {10}^{-} 23 \cdot g$

And you are quoted molar masses of EVERY chemical element on the Periodic Table....

May 13, 2018

1 mol C=$6.022 \cdot {10}^{23}$ atoms C
For what I know, 1 mole is equivalent to $6.022 \cdot {10}^{23}$ atoms.
So, 1 mol C = $6.022 \cdot {10}^{23}$ atoms C