Question

no. of atoms in 3g of berillum​

Answer 1

Answer:

Approx. 4 moles thus 4×N  

A

​

 beryllium atoms, where N  

A

​

= Avogadro's number

Explanation:

The atomic mass of berylium =9.012.g.mol  

−1

 

Thus Avogadro's number of beryllium atoms has a mass just over 9 g

Since N  

A

​

= Avogadro's number =6.022×10  

23

,

The number of beryllium atoms =  

9.012.g.mol  

−1

 

36.0.g

​

×6.022×10  

23

=2.4×10  

24

atoms

Explanation: