Agas sample is heated from -20 to 57 c and the volume is increased from 2.00 l to 4.50 l. if the initial pressure is 0.109 atm, what is the final pressure?

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.

the answer is d.) potassium