The molar mass of sodium phosphate is (do not round):

(Na=22.99; P = 30.97; O= 16.00)

all eukaryotic cell have mitochondria : )

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.

4d^55s^1 ( third choice)