how did the flaming splint behave when it was inserted into the tube with CO2? in what ways was this different from the reaction of the H2(g) to the flaming splint?

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

The answer to the question is d

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.

The correct answer is weight.