Upper H subscript 2 upper S upper O subscript 4 (a q) plus upper C a (upper O upper H) subscript 2 (a q) right arrow upper C a upper S upper O subscript 4 (a q) plus 2 upper H subscript 2 upper O (l).

Which substance is the base in the reaction?

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

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.

Idon't mean to be a smart alec, length of atoms' bonds is the simplest way to define it.

The answer this would be radiative zone