题目内容

Of the following, the amphoteric ion is ( )

A. HCO3-
B. CO32-
C. NH4+
D. ClO4-

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1.56 mM equals to ( )? ( )

A. 1560 M
B. 1.56 x 103M
C. 1.56 x 10-3 M
D. 0.156 M

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Which molecule has zero dipole moment? ( )

A. CH2Cl2
B. H2S
C. NH3
D. SO3

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A decomposition reaction has a half-life that does not depend on the initial concentration of the reactant. What is the order of the reaction? ( )

A. zero order
B. first order
C. second order
D. Order cannot be determined without more information

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Which statement is true regarding the function of a catalyst in a chemical reaction? ( )

A catalyst increases the rate of a reaction.
B. A catalyst provides an alternate mechanism for the reaction.
C. A catalyst is not consumed by the reaction.
D. All of the above are true.

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Of the following, the amphoteric ion is ( )

A. HCO3- B. CO32- C. NH4+ D. ClO4-

1.56 mM equals to ( )? ( )

Which molecule has zero dipole moment? ( )

A decomposition reaction has a half-life that does not depend on the initial concentration of the reactant. What is the order of the reaction? ( )

Which statement is true regarding the function of a catalyst in a chemical reaction? ( )

A. HCO3-
B. CO32-
C. NH4+
D. ClO4-