The molarity of pure water is

Options

A. 18
B. 50
C. 55.6
D. 100

Answer

C

Explanation

Mass of 1 L or 1000 ml water = 1000 mL `xx` 1 g m`L^(-1)` (Density of water at `4^(@)`C) = 1000 g
Number of moles of water in its 1L `=(1000g)/(18gmol^(-1))=55.55mol`
Hence, molarity of pure water is 55.6.