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rva.raghav

  • 3 years ago

Disssolving 120g of urea(mol wt 60)in 1000g of water gave a sol of density 1.15g/ml.the molarity of the solution is ....? please tell me detailed steps.

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  1. rva.raghav
    • 3 years ago
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    Please tell me soon

  2. Yahoo!
    • 3 years ago
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    Do u knw wat is Molarity..?

  3. Yahoo!
    • 3 years ago
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    \[D=\frac{ M }{ V }\] \[V=\frac{ M }{ D }\] M = 1000 + 120 = 1120gm

  4. rva.raghav
    • 3 years ago
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    but the answer is 2.05M

  5. Yahoo!
    • 3 years ago
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    Lol....First Find V then use Molarity = no of moles of solute / Volume (L)

  6. rva.raghav
    • 3 years ago
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    how to find V

  7. Yahoo!
    • 3 years ago
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    hm..thats wat i have Given u.....)

  8. Yahoo!
    • 3 years ago
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    1.15 g/ml = 1150 g/L

  9. Yahoo!
    • 3 years ago
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    \[V = 1120/1150 = 0.973L\] no of moles = 120/60 = 2

  10. Yahoo!
    • 3 years ago
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    \[M = 2/0.973 = 2.05M\]

  11. Yahoo!
    • 3 years ago
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    hope u got it...)

  12. rva.raghav
    • 3 years ago
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    tks

  13. Yahoo!
    • 3 years ago
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    Welcome..)

  14. rva.raghav
    • 3 years ago
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    yahoo...yahooo......oooooooooooooooo..............

  15. rva.raghav
    • 3 years ago
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    please wait i have to ask u another question

  16. rva.raghav
    • 3 years ago
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    Why NPN transistors a more preferred than PNP?

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