Answer:
Step-by-step explanation:
Data Given:
mass of carbon = 12.011 g
number of carbon atoms = ?
Solution:
Formula used to find the number of atoms
no. of moles = number of atoms / Avogadro's number. . . . . (1)
Where
Avogadro's number = 6.02 x 10²³
So, first we have to find number of moles
Formula to find no. of moles
no. of moles = mass in grams/ molar mass. . . . . (2)
molar mass of Carbon = 12.0107 ≅ 12.011g/mol
Put values in eq.2
no. of moles = 12.011 g / 12.011 g/mol
no. of moles = 1 mol
Now put the values in eq. 1
no. of moles = number of atoms / 6.022 x 10²³ . . . . . (1)
1 mole = number of atoms / 6.022 x 10²³
Rearrange the above equation
number of atoms = 1 mol x 6.022 x 10²³
number of atoms = 6.022 x 10²³
So it is 6.022 x 10²³ atoms equal to 12.011 grams of carbon.
**Note:
This 6.022 x 10²³ also Known as Avogadro's number that is define as one mole of any substance consists this 6.022 x 10²³ number of atoms/molecules/particles/ions