Question

One atom of an element 'x' weighs 6664*10^(-23) gm. the number of gram atom in 40

Answer 1

Hey.

Here is the answer.

As weight of 1 atom = 6.644×10^-23 g

1 Gram atom = mass of 1 mole atoms

= 6.023x 1023 x mass of one atom

=6.023x 1023 x6.664 x 10-23

= 40.13 g

= 0.004 kg

So,

Number of gram atoms in 40 kg

= 40 kg/ 0.004 kg = 1000


So, no. of gram atoms of X is 1000.

Thanks.