Select all of the decomposition reactions.

A. CaCO₃ → CO₂ + H₂O
B. Na₂CO₃ → Na₂O + CO₂
C. KCl + AgNO₃ → AgCl + KNO₃
D. Cu + Ag(NO₃)₂ → Ag + Cu(NO₃)₂
E. H₂O₂ → H₂O + O₂

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

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.