A very large redwood tree is measured to be about 100 units tall. Which unit is the most appropriate to use? A millimeters
B centimeters
C meters
D kilometers

c

Explanation:

kilometers are too long, millimeters and centimeters are too short

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.

answersilicon (si); oxygen (o);