Question

one atom of an element weigh 6.664×10-²³gm .what will be the number of gram atoms in 40 kg of it?

Answer 1

Answer:

Explanation:

The mass of 6.02×10  

23

 number of atoms = 6.644××10  

−23

×6.02×10  

23

 = 40 gm /mol (gram atomic mass )

     

Now the number of gram atoms or moles =  

atomicmass

mass(ingm)

​  

 =  

40

40×10  

3

 

​  

 = 10  

3