题目内容

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

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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

Which reaction is autoionization? ( )

A. HCl + H2O ® H3O+ + Cl-
B. H3PO4 + PO43- ® H2PO4- + HPO42-
C. 2HPO42- ® H2PO4- + PO43-
D. 2NO2 ® N2O4

For which of the equilibria is Kc = Kp? ( )

A. C(s) + CO2(g) ⇌ 2CO(g)
B. Cl2(g) ⇌ 2Cl(g)
C. 2H2(g) + O2(g) ⇌ 2H2O(g)
D. N2(g) + O2(g) ⇌ 2NO(g)

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