Question

Determine the number of atoms in 39.0 grams of sodium

Answer 1

Answer:
`1.02*10^2^4 atoms`

Step-by-step explanation:

39g *
`(1 mol)/(22.98g)` = 1.69mol

1.69 mol*
`(6.022*10^2^3 atom)/(1 mol)`=
`1.02*10^2^4 atoms`


The first fraction is molar mass, the second is Avogadro's number.