Question

One atom of element X weighs 6.644*10 to the power -23g. Calculate the number of gram atoms in 40 kg of it

Answer 1

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

Thanks.

Answer 2

Answer:

1000g atom

Explanation:

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