Question

How many molecules are there in 0.000398 mole of sample of H2O?​

Answer 1

Answer:

1 mole of a compound has 6.023×10

23

molecules in it.

⇒1 mole=6.023×10

23

molecules

0.25 mole=x molecules

⇒x=(

4

6.023

)×10

23

=1.5×10

23

molecules of water.