Part iv multiple choice worth 3 points each 1 if k c

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(48) Part IV: Multiple Choice. Worth 3 points each. ____ 1. If K c = 1.6 x 10 10 at 300 o C for the reaction 2 SO 3 (g) ! " ! # ! ! 2 SO 2 (g) + O 2 (g) then what is K c at 300 o C for the reaction below? SO 2 (g) + 1/2 O 2 (g) ! " ! # ! ! SO 3 (g) a) 1.3 x 10 5 b) 6.3 x 10 9 c) 7.9 x 10 4 d) 1.6 x 10 10 ____ 2. What is the relationship between K p and K c for the equation below? CH 3 OH(g) ! " ! # ! ! CO(g) + 2 H 2 (g) ____ 3. What is the pH of pure water at 62 o C if K w = 2.9 x 10 13 at this temperature? ____ 4. HPO 4 2– is the conjugate base of a) H 3 PO 4 b) H 2 PO 4 c)HPO 4 –2 d) PO 4 –3 ____ 5. Which is the stronger acid in the reaction below in which K c = 100 ? H 2 X + H 2 Y ! " ! # ! ! HX + H 3 Y + ____ 6. When equal molar solutions of the following compounds are prepared, the pH will be lowest for a) NaNO 3 b) Mg(CH 3 CO 2 ) 2 c) Zn(NO 3 ) 2 d) BaCl 2 ____ 7. One-hundredth molar solutions of the following acids have a pH = 2.00 except for a) HF b) HCl c) HBr d) HI ____ 8. The formulas and K a values of four ions are listed: HSO 4 1.2 x 10 2 NH 4 + 5.6 x 10 10 Fe(H 2 O) 6 3+ 6.0 x 10 3 HCO 3 5.7 x 10 11 Which of the following is the strongest base? a) SO 4 2– b) NH 3 c) Fe(H 2 O) 5 (OH) 2+ d) CO 3 2– ____ 9. According to molecular orbital theory, which of the following species will be paramagnetic? a) H 2 b) Li 2 c) Be 2 d) B 2 _____ 10. Which of the following general statements is NOT true with regard to the sequence of hybrid orbitals in this order : sp sp 2 sp 3 d 2 sp 3 a) the number of hybrid orbitals of each type increases b) the bond angles between the hybrid orbitals increases
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Page 4 c) the number of atomic orbitals contributing to each hybrid increases d) the number of electron pairs about the central atom increases. _____ 11. A room was completely filled with nitrogen gas. Four balloons were filled with oxygen, fluorine, neon, and chlorine gases respectively. When the balloons were placed in the nitrogen filled room which balloon floated off the floor? a) oxygen filled b) fluorine filled c) neon filled d) chlorine filled
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