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Find the mass of urea needed to prepare 51.00 g of an aqueous solution in which...

Find the mass of urea needed to prepare 51.00 g of an aqueous solution in which the mole fraction of urea is 0.0751. The molar mass of urea is 60.06 g/mol.

Is there a simple way to do this? I am confused with explanations for this.

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