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# A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g $mol^{−1}$) in the same solvent. If the densities of both the solutions are assumed to be equal to 1.0 g $cm^{−3}$, molar mass of the substance will be

$210.0g mol^{−1}$