R = reactants P = productsFor the above energy profiles, which reaction has the lowest activation energy?
A. a
B. b
C. c
D. d
E. All have the same activation energy.
Answer: B
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A block of ice slides with a kinetic energy of 40 J. If it slides at twice the speed, its kinetic energy is
A. 80 J. B. more than 160 J. C. 160 J. D. 40 J.
Through gravitational compression, Earth’s layers were formed by the process of ____
a. plate tectonics
b. accretion c. density stratification d. subduction e. condensation
Calcium carbonate readily dissolves in water that ____
A)is heated to 100o C B)contains a small amount of carbonic acid C)has pH > 8 D)is turbid E)contains dissolved sodium chloride
The Ottoman Empire
A) was replaced by the Byzantine Empire. B) eventually stretched into southern Europe. C) was initially led by Christians. D) imposed Shi'a Islam upon its subjects. E) is a remnant of its former self in modern day Iran.