题目内容

Use the data below to find the equilibrium constant (Kc ) for the reaction: A (g) ® 2B (g) + C (g). A (g) ® 2X (g) + C (g) Kc = 1.55B (g) ® X (g) Kc = 25.2

A. 984
B. 26.8
C. 6.10 ´ 10-4
D. 2.44 ´ 10-3

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Which term can correctly be applied to the reaction Zn(s) + 2HCl(aq) ® ZnCl2(aq) + H2(g)?

A. neutralization
B. decomposition
C. single replacement
D. double replacement

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Consider two aqueous solutions of nitrous acid (HNO2). Solution A has a concentration of [HNO2] = 0.55 M and solution B has a concentration of [HNO2] = 1.25 M. Which statement about the two solutions is true?

A. Solution A has the higher percent ionization and the higher pH
B. Solution B has the higher percent ionization and the higher pH
C. Solution A has the higher percent ionization and solution B has the higher pH
D. Solution B has the higher percent ionization and solution A has the higher pH

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Which change will cause a change in the equilibrium constant? SiF4(g) + 2H2O(g) ⇌ SiO2(s) + 4HF(g) ∆Ho = +148.9kJ

Adding more SiO2(s)
B. Increasing the temperature
C. Decreasing the pressure by increasing the volume
D. Removing water

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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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Use the data below to find the equilibrium constant (Kc ) for the reaction: A (g) ® 2B (g) + C (g). A (g) ® 2X (g) + C (g) Kc = 1.55B (g) ® X (g) Kc = 25.2

A. 984 B. 26.8 C. 6.10 ´ 10-4 D. 2.44 ´ 10-3

Which term can correctly be applied to the reaction Zn(s) + 2HCl(aq) ® ZnCl2(aq) + H2(g)?

Consider two aqueous solutions of nitrous acid (HNO2). Solution A has a concentration of [HNO2] = 0.55 M and solution B has a concentration of [HNO2] = 1.25 M. Which statement about the two solutions is true?

Which change will cause a change in the equilibrium constant? SiF4(g) + 2H2O(g) ⇌ SiO2(s) + 4HF(g) ∆Ho = +148.9kJ

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

A. 984
B. 26.8
C. 6.10 ´ 10-4
D. 2.44 ´ 10-3