9, which of the following pairs of species is not a co njugate acid-base pair?(

Question

9, which of the following pairs of species is not a co njugate acid-base pair?( (A) H2COs, HCOs (B) HOCI, oC (C),OH (D) HsO4, So- (E). HNO2, NO2 10, which of the following compounds has the highest standard entropy per mole at 2 (A) H20 () (B) Br (g) (C) CO2 (9) (D) SiO2(s) (E) CH3OH () 11. Complete each of the following nuclear equation and describe the type of radiati 12. What is the equilibrium constant expression for this system? (2 pt) H2(g) + 12(s)2H1 (g) H= +51.8 kJ 13. A student is asked to prepare a buffer solution with a pH of 10.00. This can be g a solution containing which of the following? (HNO2: Ka-4.5x104, HCN: Ka-4.9x1010) (A) HNO2 only (B) HCN only (C) HNO2 and NaNO2 (D) HCN and NaCN (E) HCN -14. Which applies to any endothermic reaction? (2 pt) (A) H50 (B) HSO (C) S 0 (E) G

Explanation / Answer

9. Option E, Conjugate acid - base pair differ by one proton. In E, it should be NO2- & not NO2+

10. Option C, gaseous CO2, entropy is the measure of the randomness

11. 29Cu66 = 30Zn66 + -1e0 (Beta emission)

12. Keq = [HI]2/ [H2], solids won't contribute anything to equilibrium constant

13. Option D

14. Option B, absorption of energy, delta H > 0

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