Question

One atom of an element X weighs 6.644*10^-23gm. calculate number of gm-atoms in 40 kg of it .​

Answer 1

Explanation:

Hey.

Here is the answer.

weight of 1 atom = 6.644×10^-23 g

so, no. of atoms in 40 kg

= 40×10^3 / 6.644×10^-23

= 6.02046 × 10^26 atoms

As, 1 gram atom = no. atoms in one mole = 6.02×10^23

so, no. of gram atom = 6.02046×10^26/6.02×10^23

=1000 gram atoms