21 given the balanced equation representing a reaction: o2 --> o + o
what occurs during this reaction?
(1) energy is absorbed as bonds are broken.
(2) energy is absorbed as bonds are formed.
(3) energy is released as bonds are broken.
(4) energy is released as bonds arc formed.

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Which words or phrases identify layers of groundwater? check all that apply. water table kettle lake saturation zone underground lake sinkhole will give brainiest, answer quickly.