Question

Calculate number of moles in 12.046 x 10^22 atoms of copper

Answer 1

6.023 x 10^23 atoms of Cu weigh one mole.

One atom of Cu weighs  1/ 6.023 x 10^23 mole.

Therefore 12.046 x 10^ 22 atoms weigh

=  (1/ 6.023 x 10^23) x 12.046 x 10^ 22 moles
= 0.2 moles

Hope it helps ^_^

Answer 2

Hello Deepu,

Given,

Number of atoms = 12.046 x 10^ 22 atoms

1 mole = 6.022 x 10^23 atoms

Number of moles = Number of atoms/ Avagadro's number

= 12.046 x 10^22/ 6.023 x 10^23 
= 2 x 10 ^-1
= 0.2 moles.

hope it helps u............