How many moles are contained in 3.131 × 1024 particles?

There are 5.199 moles in particles.

Explanation:

Where:

N = Number of particles / atoms/ molecules

n = Number of moles

= Avogadro's number

We have:

N =

n =?

n = 5.199 moles

There are 5.199 moles in particles.

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.