题目内容

Which of the following can NOT reach the equilibrium shown by the equation CaCO3(s) ⇌ CaO(s) + CO2(g)

A. Pure CaCO3(s)
B. Pure CaO(s)
C. A mixture of CaCO3(s) and CaO(s)
D. CaO(s) and a concentration of CO2(g) greater than the equilibrium concentration

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For a given reaction, doubling the temperature will increase the reaction rate by ()

A. 2
B. 0.61
C. 2.7
D. 1.6

The reaction C ® products is a first-order reaction with t1/2 = 1.3 ´ 104 s. If the initial concentration of C is 0.200 M, what will be the concentration of C after 2.6 ´ 104 s? ( )

A. 0.025 M
B. 0.050 M
C. 0.100 M
D. 0.200 M

The rate law for a reaction B ® products is rate = k[B], which graph will give a straight line? ( )

A. ln[B] vs. time
B. [B] vs. time
C. 1/[B] vs. time
D. ln[B] vs. 1/time

At low temperatures, the reaction CO(g) + NO2(g) ® CO2(g) + NO(g) is zero order in CO and first order in NO2. The rate law is rate = ( )

A. k[CO][NO2]
B. k[NO2]
C. k[CO]2[NO2]
D. k[NO2]2