What is the final volume of a 7.50 L gas sample that is subjected to a temperatire change from 35 degrees celsius to 50 degrees celsius and a pressure change from 9.20 atm to 3.20 atm?

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.

The correct answer is b) false