Question

how many atoms are present in 18 gram of water​

Answer 1

no. of moles = given mass

atomic mass

=18. ( atomic mass of H2O

18. is 18)

= 1 mole

no. of moles= no. of atoms.

Avogadro's no.

1= no. of atoms

6.022× 10^23

= no. of atoms = 6.022 × 10^23 atoms