The expression for boiling point elevation and freezing point depression apply acurately to dilute solutions only. the molefraction of NaI in the solution is 0.390 compute the molality of this solution. compare the boiling point elevation predicted byt hte expression

you did not give any options thus this is the best answer i can give to you with this little information you have given

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substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.