What is the molarity of sodium chloride in sea water if it contains roughly 28.0 g of NaCl per liter?

Given:Sea water contains roughly 28.0 g of NaCl per liter.

To find: What is the molarity of sodium chloride (NaCl) in sea water?

Solution:

Molecular mass of NaCl= 58.4

Therefore 1 mole of NaCl= 58.4 g

Number of moles in sea water= 28/58.4= 0.479

Therefore, 1 litre of water contains 0.479 moles of NaCl

Now, Molarity(M) = Number of moles of solute/ volume of solvent.

Therefore,

M= 0.479/1 = 0.479M

0.4791M is the molarity that I calculated, it is correct