The law of conservation of mass states that mass must be created or destroyed in ordinary chemical and physical changes. Is this true or false?

Fine out you self hx

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.

Idon't mean to be a smart alec, length of atoms' bonds is the simplest way to define it.