How many molecules of h20 are there in 1.0 g of h20?

As a random guess, I'd have to say 20? I'm a bit rusty on my chemistry, but this is my thought process: If there's 1 proton and 0 neutrons in a single hydrogen atom, and each proton and neutron is 1g each, then i would assume that 20 atoms of H times (1 proton + 0 neutrons) would equal 20. Please correct me if I'm wrong :)

Enzyme make a hormone as a catalyst

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.