Dowonium (D) exists as 2 naturally occurring isotopes. D-88 occurs 56% of the time, and D-90 occurs the rest. What is the average atornic mass of Dowonium?* 88.65amu
89.12amu
88.99 amu
88.88amu

m=9

step-by-step explanation:

7m+8=71 subtract   8 from 71 which is 63 than divide it by 7m   equal 9.

                             

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.

Ibelieve it is b. proton.hope my answer has you : )