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6.0 g of urea was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P°, the vapour pressure of solution is:
  • a)
    0.10 P°
  • b)
    1.10 P°
  • c)
    0.99 P°
  • d)
    0.90 P°
Correct answer is option 'D'. Can you explain this answer?
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6.0 g of urea was dissolved in 9.9 moles of water. If the vapour press...
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6.0 g of urea was dissolved in 9.9 moles of water. If the vapour press...
0 at the given temperature, and the vapour pressure of the solution is P, calculate the relative lowering of vapour pressure.

Relative lowering of vapour pressure is given by the formula:

ΔP/P₀ = X₂

where ΔP is the change in vapour pressure, P₀ is the vapour pressure of the pure solvent, X₂ is the mole fraction of the solute.

First, we need to calculate the mole fraction of urea in the solution:

Moles of urea = mass/molar mass = 6.0 g/60.06 g/mol = 0.0999 mol

Moles of water = 9.9 moles

Total moles of solute and solvent = 0.0999 + 9.9 = 10.0 moles

Mole fraction of urea = moles of urea/total moles = 0.0999/10.0 = 0.00999

Now, we can calculate the relative lowering of vapour pressure:

ΔP/P₀ = X₂

ΔP/P₀ = 0.00999

Therefore, the relative lowering of vapour pressure is 0.00999.
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6.0 g of urea was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P°, the vapour pressure of solution is:a)0.10 P°b)1.10 P°c)0.99P°d)0.90P°Correct answer is option 'D'. Can you explain this answer?
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6.0 g of urea was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P°, the vapour pressure of solution is:a)0.10 P°b)1.10 P°c)0.99P°d)0.90P°Correct answer is option 'D'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about 6.0 g of urea was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P°, the vapour pressure of solution is:a)0.10 P°b)1.10 P°c)0.99P°d)0.90P°Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 6.0 g of urea was dissolved in 9.9 moles of water. If the vapour pressure of pure water is P°, the vapour pressure of solution is:a)0.10 P°b)1.10 P°c)0.99P°d)0.90P°Correct answer is option 'D'. Can you explain this answer?.
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