Answer:
The answer is
To find the number of atoms of sodium we use the formula
N = n × L
where
n is the number of moles
N is the number of entities
L is Avogadro's constant which is
[tex]6.02 \times {10}^{23} [/tex]
We need to find the number of moles first
The formula is
[tex]n = \frac{m}{M} [/tex]
where
M is the molar mass
m is the mass
n is the number of moles
From the question
M = 22.9 g/mol
m = 51.0 g
[tex]n = \frac{51}{22.9} [/tex]
n = 2.227 moles
So the number of sodium atoms is
[tex]N = 2.227 \times 6.02 \times {10}^{23} [/tex]
We have the final answer as
Hope this helps you
