What is the total number of electrons in a
mg2+ ion? (1) 10 (3) 14
(2) 12 (4) 24

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

Certain types of organisms such as fireflies and anglerfish can produce light through chemical reactions in a process called bioluminescence. what kind of chemical reactions occur during bioluminescence? o a) exothermic ob) endothermic oc) recomposition od) decomposition

Consider the following system at equilibrium. caco3(s) = ca2+(aq) + co32-(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? occia co2 cuso4 na2co3