The Number Ratio of Atoms in Na2CO3

The chemical formula of
Na2CO3
consists of:
number of
Na atoms		 number of
C atoms		 number of
O atoms
one formula unit
two Na atoms
one C atom
three O atoms
12 formula units
2(12) =
24 Na atoms
1(12) =
12 C atoms
3(12) =
36 O atoms
one dozen formula units
two dozens Na atoms
one dozen C atoms
three dozens O atoms
6.022 x 1023 formula units
2(6.022 x 1023)
= 12.044 x 1023 Na atoms
1(6.022 x 1023)
= 6.022 x 1023 C atoms
3(6.022 x 1023)
= 18.066 x 1023 O atoms
one mole formula units
2 moles Na atoms
1 mole C atoms
3 moles O atoms