The following compounds have similar molecular weights. Which has the highest boiling point? O a. CH3CH2CH3 O b. CH3OCH3 O C. CH3CH₂OH O d. CH3CH=O

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38. Rank the following molecules from lowest to highest boiling point: CH4, He, HF, C4H10. А. C4H10 < He < HF < CH4 HF < He < C4H10 < CH4 HF < C4H10 < CH4 < He CH4 < HF < He< В. С. < C4H10 He < CH4 < C4H10 < HF D. E.

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O d. CH3CH2CH3 O e. CH,O (H and O are all attached to C) Which of the following will have the lowest boiling point? 1. CH3(CH2)3 CH3 of I. CH;CH2CH3 I. CH3CH2CH2OH IV. CH;CHOHCH3 Select one: Oa. . II. O b. I. O c. IV. О с. O d. III. ous solution due to 62°F

22. Indicate which of the following molecules exhibits the weakest dispersion forces. a. CH3CH3 (molecular weight: 30.0 g/mol) b. CH4 (molecular weight: 16.0 g/mol) c. CH3CH2CH3 (molecular weight: 44.0 g/mol) d. CH3CH2CH2CH3 (molecular weight: 58.0 g/mol) 23. What is/are the functions of an electrolyte in the body? a. Regulate the fluid levels in your blood plasma and your body b. Enable muscle contractions, including the beating of your heart C. Transmit nerve signals from heart, muscle and nerve cells to other cells d. All of the above

Which compound would you expect to have the highest boiling point? NH2 N. N. i. ii. iii. O ii. only i. only iii. only there is no way to know

7. Rank the following compounds in order of increasing boiling point. Ranking 11 OH III HO IV OH

50. Which compound below would you expect to be most soluble in water? CF4 P b. CCl4 с. CН-Cl d. CH3OH a.

Consider the two molecules shown below. One has a boiling point of 57 oC; the other, 84 oC. Predict which has the higher boiling point and explain your choice.  a. 1,2 dichloroethane b. 1, 1 dichloroethane