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Hundred gram of Al(HNO3)3 (molar mass 21...

Hundred gram of `Al(HNO_3)_3` (molar mass `213 gmol^-1`) is dissolved in 1 L of water at `20^@C`. The density of water at this temperature is `0.9983 gcm^-3`and the density of resulting solution is `0.9990 gcm^-3`. Calculate the molarity and molality of this solution.

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