Aflask contains 0.230 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask.

There are of bromine molecules present in the flask.

Explanation:

Moles of liquid bromine in the flask = 0.230 mol

As we know that 1 mole is equal to the Avogadro number.

atoms/ molecules

So, number of bromine molecules in 0.230 moles of liquid bromine is:

There are of bromine molecules present in the flask.

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.