1. Avogadro's Number

* Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's approximately 6.022 x 10^23 particles/mole.

2. Calculation

* We can set up a proportion:

(moles of water) / (2.35 x 10^24 molecules) = (1 mole) / (6.022 x 10^23 molecules)

* Solve for moles of water:

moles of water = (2.35 x 10^24 molecules) * (1 mole / 6.022 x 10^23 molecules)

* Calculate:

moles of water ≈ 3.90 moles

Therefore, there are approximately 3.90 moles of water in 2.35 x 10^24 molecules.