The molar mass of water (H2O) is approximately 18 grams per mole. To calculate the number of moles in 125 grams of water, we divide 125 g by 18 g/mol:
125 g ÷ 18 g/mol ≈ 6.94 mol
Therefore, there are approximately 6.94 moles of water in 125 grams of water.