What functional group is expected when hex-3-yne is treated with disiamylborane, followed by treatment with basic hydrogen peroxide? a ketone b aldehyde c diol d ether

Ketone.

Explanation:

Disiamylborane is used for hydroboration of an alkene or alkyne.

An alkene hydroboration gives an alcohol and an alkyne gives carbonyl compound.

A terminal alkyne gives aldehyde while a non terminal alkyne gives ketone or hydroboration.

The role of hydrogen peroxide is that it results in oxidative hydroboration and hydroboration can also be reductive if we use Zinc.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)