To calculate how many grams NH3 will be formed from 6.0 g H2, the first step you need A) information about chemical reaction is balanced or not.
B) set up given mole ratio of reactant vs products.
C) information about the mass of N2 reacting.
D) Set up mole ratios of reactants vs products from balanced chemical equation.

N2 + H2 → NH3

You know how the first one if filled up like the objects do the same but with the other categories

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.