The element arsenic has the properties of

Metalloid

Explanation:Elements in the periodic table are classified as either metals, non-metals and metalloids.Metalloids are elements that exhibits both metallic and non-metallic properties. Arsenic is an example of a metalloid.Metals form ions by losing electron(s) while non-metals form ions by gaining electron(s).Metalloids on the other hand reacts by either gaining or losing electron(s) a property which indicates both metalliic and non-metallic property.

The answer is 323 g.

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.