When performing a grignard reaction it is also very important that the reaction be free from acetone (a chemical we commonly use to clean the glassware). why must the glassware be free from acetone?

Solubility would be your answer.

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

It could possibly be beneficial if the experiment is successful.

The answer is b. because when it leaves the bat, its bringing motion on where its going.