The largest ruby isnthe world is 10.9 cm long, 9.1 cm wide and 5.8 cm thick, giving
it am overall volume of 575 cm3. if the density of the ruby is 3.97 g/cm3 what is the mass of the largest ruby?

You have to use density=mass/volume formula:



Solve for x and you get 2282.75 grams

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.