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Calculated the mass urea (H2NCONH2)requi...

Calculated the mass urea `(H_2NCONH_2)`required to dissolved in 2.5 kg of water to form a 0.25 molal aqueous solution.

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Verified by Experts

Molar mass of urea = `60g mol^(-1)`
Molality (m) =(mass of urea)/(Molar mass of urea xxMass of water in kg)
`therefore` Mass of urea = (Molalityxx Molar lass of urea xxMass of water in kg)
= `0.25xx 60 xx 2.5 =37.5g`
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