rva.raghav
  • rva.raghav
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.
Chemistry
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SOLVED
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jamiebookeater
  • jamiebookeater
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rva.raghav
  • rva.raghav
Please tell me soon
anonymous
  • anonymous
Do u knw wat is Molarity..?
anonymous
  • anonymous
\[D=\frac{ M }{ V }\] \[V=\frac{ M }{ D }\] M = 1000 + 120 = 1120gm

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rva.raghav
  • rva.raghav
but the answer is 2.05M
anonymous
  • anonymous
Lol....First Find V then use Molarity = no of moles of solute / Volume (L)
rva.raghav
  • rva.raghav
how to find V
anonymous
  • anonymous
hm..thats wat i have Given u.....)
anonymous
  • anonymous
1.15 g/ml = 1150 g/L
anonymous
  • anonymous
\[V = 1120/1150 = 0.973L\] no of moles = 120/60 = 2
anonymous
  • anonymous
\[M = 2/0.973 = 2.05M\]
anonymous
  • anonymous
hope u got it...)
rva.raghav
  • rva.raghav
tks
anonymous
  • anonymous
Welcome..)
rva.raghav
  • rva.raghav
yahoo...yahooo......oooooooooooooooo..............
rva.raghav
  • rva.raghav
please wait i have to ask u another question
rva.raghav
  • rva.raghav
Why NPN transistors a more preferred than PNP?

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