2AL+3H2SO4->Al2(SO4)3+3H2 if 7.4g Al reacts with 16.7g H2SO4, how many grams of H2 will be produced?
Calculate the mass of the reagent at end of reaction.

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

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.

Answer the molar mass of magnesium is 24.305g/mol.