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Molar refers to the unit of concentration molarity, which is equal to the number of moles per liter of a solution. In chemistry, the term most often refers to molar concentration of a solute in a solution. Molar concentration has the units mol/L or M.
Molar also refers to other measurements dealing with moles such as molar mass, molar heat capacity and molar volume.
Example
A 6 molar (6 M) solution of H2SO4 refers to a solution with six moles of sulfuric acid per liter of solution. Remember, the volume refers to liters of solution, not liters of water added to prepare the solution.
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