what is abnormal molar masses?
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abnormal molecular masses are experimentally determined when association or dissociation takes place.A number equal to the sum of the atomic masses of the atom in a molecule. The molecular mass gives the mass of a molecules relative to that of the ¹²C atom, which is taken to have a mass of 12.
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Explanation:
For the substances undergoing association, dissociation etc. In the solution, molecular mass determined from colligative properties is different (either lower or higher) from expected value.
This is known as abnormal molar mass. This change can be known by using van't Hoff factor.
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