Question

the molarity of pure water is..
i need the explanation pls

Answer 1

water = h2o = 1 ×2 + 16 = 18

Answer 2

55.5 M

The standard state for a liquid is the pure liquid, so the standard state of water is pure water, whose concentration is 55.5 M (in a liter, there are 55.5 moles of water, so its concentration is 55.5 mol/L). In dilute aqueous solutions, the concentration of water is very close to 55.5 M.