250 mL of a solution of calcium oxalate is the evaporated until only a residue of solid calcium oxalate is left. The mass of the residue recovered from the container was 154 mg. What is the
solubility product of calcium oxalate?

What does that mean you dum bum

Compound with sulfer  is bright red 

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.