Calculate the molarity of pure water if its density at room temperature is 1.0gcm.

Molarity = No. of moles of solute / Volume of solution

Before finding the Molarity let us find the mass of one litre of water –

Therefore, Mass of 1 litre = Density of water × volume

= 1 kg / L × 1 L 1 kg = 1000 grams

⇒ Mass of 1 kg of water = Mass / Molar Mass

= 1000 / 18 = 55.56

⇒ Molarity of water = 55.56 / litre.

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