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2 | CBSE Practice Paper, XII vapour pressure by 0-23 mm of Hg. Vapour pressure of pure water is 542 mm of Hg.- In a first order reaction the concentration of reactant is reduced from 0-6 mollit + to 0-2 mojminutes,- What would be the weight of glucose which when dissolved in 100 g of water will cause one. |
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Answer» Mass of UREA =5 gMass of water =100−5=95 gNumber of moles of urea = 605 =0.083Number of moles of water = 1895 =5.278∴ Total NUMBER of moles =5.278+0.083=5.361Mole FRACTION of solvent = 5.3615.278 P s = MOLE fraction of solvent ×P o = 5.3615.278 ×23.5 = 23.14 mm Hg ≈ 23 mm Hg |
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