To calculate the number of moles of water, you need to divide the given mass of water by its molar mass.
Number of moles of water = Mass of water ÷ Molar mass of water
First, let's convert the given mass of water to grams.
Mass of water = 43 g
Next, we'll divide the mass by the molar mass:
Molar mass of water = 18 g/mol
Number of moles of water = 43 g ÷ 18 g/mol ≈ 2.39 mol
Therefore, there are approximately 2.39 moles of water in 43 g of water.