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Answer the following statement true (T) or false (F)
False
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In general, slow reactions
a. are exothermic. b. are endothermic. c. have low activation energies. d. have high activation energies.
Three charged particles are arranged on corners of a square as shown in Figure OQ23.11, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner. Suppose the +2Q charge at the lower left corner is removed. Then the magnitude of the field at the upper right corner:
1.becomes larger.
2.becomes smaller.
3.stays the same.
4.changes unpredictably.
Power is defined as the
A) force exerted divided by the time of exertion. B) force exerted multiplied by the distance moved. C) work done multiplied by the time to do the work. D) work done divided by the time to do the work. E) none of the above
Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, how do their average molecular speeds compare? The oxygen molecules are moving
A) 16 times faster. B) at 1/4 the speed. C) 4 times faster. D) the same as the hydrogen molecules. E) at 1/16 the speed.