Stoichiometry
Which of the following expressions defines the Baume gravity scale for liquids lighter than water?

°Be = 145 - (145/G)
°Be = (140/G) - 130
°Be = 200(G-1)
°Be = (400/G) - 400

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Stoichiometry
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

The attractive forces between like and unlike molecules are almost equal
The component molecules are non polar and are of almost equal size
In the formation of solution, chemical combination/molecular association between unlike molecules takes place
No component is concentrated at the surface of the solution

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