How to calculate the molarity of pure water if it`s density is given as 1000kg/m3

Molarity = Number of moles of solute per litre of solution in molar concentration

M = no of moles / volume

Mole = mass/molar mass = 1000/18= 55.56 mol

1l of water = 1000mL = 1Kg

Density = 1000kg/m3

therefore Molarity = 55.56mol/1L = 55.56mol/L