What is the molar mass of aluminum(round to the 100ths place)? What is the mole ratio between Al and Cu In the balanced reaction?(1:1 format, no units)?

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

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.

Ithink about 50 % of an original isotope's number of atoms remain

H tricky one let me think and get back to u