Now you should be able to work out the relative formula mass of: Na, Co,.10H,0
Na, co,
10H2O
2 x 23 = 46
20 x 1 = 20
1 x 12 = 12
10 x 16 = 160
3 x 16 = 106
Total= 164
Total = 180
Then you add both: 164 + 180 = 344

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth