Heated blocks of iron used to be used to warm beds. a 2058.4 g brick of iron would be heated to 370.0 °c and placed into a box
at the end of the bed. how many joules of energy would be released as it cooled to 25 °c overnight? (specific heat of fe = 0.449
j/g °c)

If you open the bottle of perfume then nothing but the smell will come out of it and yes it is a type of gas smell because it’s say it in english so i can understand better and you

C) electrons encircling a nucleus with neutrons and protons

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.