A snowflake contains 2.0 1018 molecules of water. How many moles of water does it contain?

mol

3.32e-6 moles of water contained in the snowflake

Explanation:

number of moles is given by

n = number of particles (atom, ion, molecules) / Avogadro number of particles

putting the value we get

n=2.0e18/6.023e23

n=3.32e-6 of water it contain