One mole of carbon atom weighs $12 ext{ g}$, the number of atoms in it is equal to: (Mass of carbon-12 is $1

Question

One mole of carbon atom weighs $12 	ext{ g}$, the number of atoms in it is equal to: (Mass of carbon-12 is $1.9926 	imes 10^{-23} 	ext{ g}$)

Accepted Answer

To find the number of atoms in one mole of carbon, we divide the total mass of one mole of carbon by the mass of a single carbon-12 atom .
Number of atoms $= \frac{	ext{Mass of one mole}}{	ext{Mass of one atom}}$
Number of atoms $= \frac{12 	ext{ g}}{1.992648 	imes 10^{-23} 	ext{ g}} \approx 6.022 	imes 10^{23}$ atoms .
This value is also known as Avogadro's constant ($N_A$) .

Step-by-Step Solution

Practice All CHEMISTRY Questions