Identify the reactant needed to form t-butylalcohol from acetone.

Explanation

When acetone reacts with methyl magnesium bromide followed by the hydrolysis forms t-butyl alcohol.
`underset("Acetone")(CH_(3)-COCH_(3))+underset("Methyl magnesium bromide")(CH_(3)MgBr) to CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-OMgBr overset(H_(2)O)to underset("t-butyl alcohol")(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-OH)`