Molality is moles of solute divided by kg of solvent 17 mol 071 kg 2 4 m NOTE

Molality is moles of solute divided by kg of solvent

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Molality is moles of solute divided by kg of solvent: 0 . 17 mol 0 . 071 kg = 2 . 4 m NOTE: You do NOT need to use the density in this problem. You would need it if you were calculating molarity instead of molality. 005 10.0points Based on the types and strengths of in- termolecular forces present, place the com- pounds C 6 H 14 , C 3 H 8 , C 5 H 11 OH , C 5 H 11 Cl , CaBr 2 in order from lowest to highest boiling point (lowest on the left, highest on the right). 1. C 3 H 8 , C 6 H 14 , C 5 H 11 OH , C 5 H 11 Cl , CaBr 2 2. C 3 H 8 , C 5 H 11 OH , C 6 H 14 , C 5 H 11 Cl , CaBr 2 3. C 3 H 8 , C 6 H 14 , C 5 H 11 Cl , C 5 H 11 OH , CaBr 2 correct 4. CaBr 2 , C 5 H 11 OH , C 5 H 11 Cl , C 6 H 14 , C 3 H 8 5. C 6 H 14 , C 3 H 8 , C 5 H 11 OH , C 5 H 11 Cl , CaBr 2 6. CaBr 2 , C 5 H 11 Cl , C 6 H 14 , C 5 H 11 OH , C 3 H 8 Explanation: C 3 H 8 and C 6 H 14 have only dispersion forces, the weakest type of intermolecular
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Version 026 – Exam 1 – fakhreddine – (51615) 3forces. C6H14has a higher molecular weightand will therefore have stronger dispersionforces.C4H11Cl and C5H11OH are both approx-imately the same size as C6H14and wouldtherefore have about the same strength of dis-persion forces. C4H11Cl also has dipole-dipoleinteractions, stronger than dispersion forces.C5H11OH also has H - bonding, stronger thandipole-dipole interactions.CaBr2is ionic and has interionic forces, thestrongest type of intermolecular forces.The stronger the intermolecular forces, thehigher the boiling point.006(part1of3)5.0points Consider the following phase diagram forthe next 3 questions.YZX2040608010012080160240320Temperature, KPressure, atmWhat is the lowest temperature at whichliquid can exist?1.The sample cannot be liquefied at 335 K.correct2.120 atm3.100 atm4.80 atm5.60 atmExplanation:00910.0pointsWhich is NOT a consequence of hydrogenbonding between water molecules?
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Version 026 – Exam 1 – fakhreddine – (51615)
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