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Calculate the mass of urea ("NH"(2)"CONH...

Calculate the mass of urea `("NH"_(2)"CONH"_(2))` required in making 2.5 kg of 0.25 molar aqueous solution.
We know that molarity (m) `=("Moles of solute")/("Mass of solvent in kg")`
and moles of soute `=("Mass of solute")/("Molar mass of solute")`
So, find the molar mass of solute by adding atomic masses of different element present in it and mass by using the formula,
Molality `=("Mass of solute/molar mass of solute")/("Mass of solvent in kg")`

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The correct Answer is:
37.5 g
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AAKASH SERIES-DILUTE SOLUTIONS-EXERCISE - 1.1.1
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