题目内容

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

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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)

7.81 ( ) = 78.1 ml ( )

A. x10-4 m3
B. x104 mL
C. x 10-1 d3
D. x 106 nL

A mixture of 5.0 ´ 10-5 mol H2(g) and 5.0 ´ 10-5 mol SO2(g) is placed in a 10.0 L container at 25 oC. The container has a pinhole leak. After a period of time, the partial pressure of H2 in the container ( )

A. is less than that of the SO2(g)
B. is equal to that of the SO2(g)
C. exceeds that of the SO2(g)
D. is the same as in the original mixture

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