Multi-Step Conversions (Always go through moles!) Example: How many grams of water (H2O) will you need in order to have
3.22 x 1024 water molecules?

Mass of water needed : 96.3 g

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles H₂O=

mass H₂O(MW=18 g/mol) :

answer///carbon;