3. A compound does dissolve in water. Is this enough information to determine whether it
is an ionic or covalent compound?
a. Yes, only covalent compounds
dissolve in water.
b. No, covalent compounds always
dissolve, but some ionic compounds
also dissolve.
C. No, ionic compounds always dissolve,
but some covalent compounds also
dissolve.
d. Yes, only ionic compounds dissolve in
water.

Yes she is correct. the answer is completely correct

Sorry i dont understand the question can you rephase it?

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.