M methanol 05 M Li 2 SO 4 10 M sugar 3 M FeNO 3 2 2 3 M FeNO 3 2 10 M sugar 05

# M methanol 05 m li 2 so 4 10 m sugar 3 m feno 3 2 2 3

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1.6 M methanol>0.5 M Li2SO4>10 Msugar>3 M Fe(NO3)22.3 M Fe(NO3)2>10 M sugar>0.5 M Li 2 SO 4 > 6 M methanol 3. 3 M Fe(NO 3 ) 2 > 10 M sugar > 6 M methanol > 0.5 M Li 2 SO 4 4. 10 M sugar > 3 M Fe(NO 3 ) 2 > 0.5 M Li 2 SO 4 > 6 M methanol 5. 10 M sugar > 3 M Fe(NO 3 ) 2 > 6 M methanol > 0.5 M Li 2 SO 4 correct Explanation: A solutions effective molality is its stated molality multiplied by its van’t Hoff factor: smallskip m eff = i · m stated smallskip Molecu- lar solids have a van’t Hoff coefficient of very nearly 1. Strong electrolytes have van’t Hoff coefficients roughly equal to the number of constituent ions in their unit formula. Explanation: If ΔG is positive, K must be less than 1; if ΔG is negative, K must be greater than 1. Also, if ΔG is small (compared to RT), then K will be close to 1, and if ΔG is large, K will be much smaller or greater than 1. 009 6.0 points Imagine a hypothetical reacion for which,ΔH= 0 kJ·mol1.Considering the LeChatelier principle, which of the followingstatements is true?
Version 384 – Exam 1 – Laude – (52455) 3 1.Lowering the temperature of the systemcause the reaction to shift left. 6.0 points Rank the following species from most toleast miscible in propane (C3H8): CH 2 NH, CH 3 F, H 2 O, C 4 H 10 1. CH 2 NH > H 2 O > C 4 H 10 > CH 3 F 2. C 4 H 10 > CH 3 F > CH 2 NH > H 2 O cor- rect 3. C 4 H 10 > CH 2 NH > H 2 O > CH 3 F 4. CH 3 F > CH 3 F > H 2 O > CH 2 NH 5. CH 3 F > C 4 H 10 > CH 2 NH > H 2 O Explanation: 011 6.0 points Which of the following would increase thesolubility of nitrogen gas, N2(g), in the solventwater? I) changing to a less polar solventII) increasing the amount of solventIII) increasing the pressure of N2(g)