You are given a sample contains 0.40 moles of a substance. how many samples are in the atom if the substance is zinc?

1 mole zinc 6.02 x 10²³ molecules
0.40 moles zinc ( molecules zinc )

molecules zinc = 0.40 x ( 6.02 x 10²³) / 1

molecules zinc = 2.40  x 10²³ / 1

= 2.40 x 10²³ molecules of zinc

hope this helps!

Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.