4g of a divalent metal was dissolved in 100cc of 2M H2SO4 (f=1.01). the excess acid required 30cc of 1N NaOH for complete neutralization . find the atomic mass of the metal.

The gas would begin to expand, and eventually the can would burst or explode.

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.

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.

That depends. cause the owl finished it in one lick