For two solutions containing the same concentration of nickel, the atomic absorption at 352.4 nm was about 30% greater for a solution that contained 50% ethanol than for an aqueous solution that contained no ethanol. Explain.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

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.