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What weight of the non-volatile solute u...

What weight of the non-volatile solute urea' `(NH_(2)-CO-NH_(2))` needs to be dissolved in `100 g` of water in order to decrease the vapour pressure of water by `25%`? What will be the molality of the solution?

A

18.52 m

B

62.45 m

C

28.52 m

D

35.64 m

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The correct Answer is:
A
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Knowledge Check

  • What weight of non - volatile solute,urea (NH_(2)CONH_(2)) needs to be dissolved in 100g of water, in order to decrease the vapour pressure of water by 25% .

    A
    `11.1gm`
    B
    `111.1gm`
    C
    `9.82gm`
    D
    `982 gm`

  • What mass of urea be dissolved in 171 g of water so as to decrease the vapour pressure of water by 5% ?

    A
    `15 g`
    B
    `20 g`
    C
    `25 g`
    D
    `30 g`

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