15) The element X has three naturally occurring isotopes. The isotopic massed (amu) and % abundances of the isotopes are given in the table below. the average atomic mass of the element is _ amu.

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

The answer is not c