What is the molarity (m) of 1 liter of a solution that has 120 g of nacl dissolved in it?

The answer to your question is 2.1

Explanation:

Data

Molarity = 1 l

mass = 120 g of NaCl

moles = ?

Formula

Process

1.- Calculate the number of moles of NaCl

Molecular weight NaCl = 23 + 35.5 = 58.5 g

2.- Calculate the number of moles using proportions

                           58.5 g of NaCl --------------- 1 mol

                        120.0 g of NaCl  ---------------  x

                             x = ( 120 x 1) / 58.5

                             x = 2.1 moles

3.- Calculate Molarity

Substitution

Simplification and result

       Molarity = 2.1

2.05 M

Explanation:

Molarity is defined as number of moles of solute in 1 L of solution.

Molarity =

Here we have 120 g of NaCl in 1 liter of solution.

Molar mass of NaCl = 58.5 g

Number of moles of NaCl = =

Volume of solution = 1 L

Molarity =