A student prepared a stock solution by dissolving 10.0 g of NaOH in enough water to make 150.0 mL of solution. She then took 15.0 mL of the stock solution and
diluted it with enough water to make 65.0 mL of a final solution. What is the
concentration of the final NaOH solution?

i think slash and

it is a solid

explanation:

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.