What is the molarity of a 2.0 l sodium hydroxide solution containing 10.0 grams of solute?

0.125 M

Explanation:

Molarity or concentration is given by;

= Moles/volume in litres

But; moles = mass/Relative formula mass

                  = 10.0/40.0

                  = 0.25 Moles

Molarity = 0.25 moles/2.0 L

              = 0.125 M

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