What is the concentration of KCl if 10 g are dissolved in enough water to make 12 L?

Concentration = 0.011 M

Explanation:

Molarity is given by dividing number of moles by volume in Liters

Molarity = moles/volume

But;

Number of moles = mass/molar mass

= 10 g / 74.55 g/mole

= 0.134 moles

Therefore;

Molarity = 0.134 moles/12 L

= 0.011 M