The molar mass of water (H2O) is approximately 18 grams per mole. To determine the number of moles of water in 180 grams of water, you can use the following formula:

Number of moles = Mass of water (in grams) / Molar mass of water

In this case:

Number of moles = 180 grams / 18 grams per mole

Number of moles ≈ 10 moles

Therefore, there are approximately 10 moles of water present in 180 grams of water.