Chem1011 Sample Quiz 2 (i) 1. What is the molecular formula of the following compound a) C9H9NO b) C9H10NO c) C10H10NO d) C10H11NO e) C10H12NO NO Questions 2 and 3 refer to the following experiment. 0.080 M aluminium nitrate solution (50 mL) is added to 0.060 M potassium phosphate solution (100 mL). 2. Presuming a complete reaction occurs, what amount (in mol) of AlPO4 precipitates a) 0.060 b) 0.0060 c) 0.0040 d) 0.0020 e) 0.040 3. What is the final concentration of PO43–(aq) ions remaining in solution after the reaction a) 0.020 M b) 0.013 M c) 0.040 M d) 0.060 M e) 0.010 M 4. The thermal decomposition of potassium chlorate is a convenient preparation for small amounts of oxygen gas in the laboratory. The reaction is: 2KClO3(s) o 2KCl(s) + 3O2(g) What mass of potassium chlorate would produce a theoretical yield of 10.00 g of oxygen a) 25.5 g b) 30.4 g c) 38.3 g d) 51.1 g e) 57.5 g 5. One resonance structure of the carbonate ion is shown below. What is the bond order of the carbon–oxygen bond in CO32– a) 1.0 b) 1.33 c) 1.5 d) 1.66 e) 2.0 CO O O 2 DHH.ci ǜ icc.ci H C C cC-HHHf.it Al.IN0313 K3 P04 c n = ( V = 0. 0 8× 0 . 05 = 0 . 0 0 4Alnicvio.obxo.li0 . 0 0 6 P04 1 M.IN0313 +1km → 1 肶4 +31仳3 1 : 1B 使 04 = o . 0 0 4 md 剩余 : 0 0 0 6 – o . 0 0 4 = 00 0 2moto.15Lcr-if-i-o.isM ffe n 1 02 ) =f = o. 3 1 2 5 m 0 1 0 . 3 1 2 5 x# = 0 . 20 83 mol kcl 1 2 2 .5 32 0 . 2083X122 、 5 = 25. 59 键级 B bondNo.int 单个 原 之间 的 键基数 : 3 bondorder =_= 1 . 3 3 6. What is the molecular geometry of the NO3– ion a) trigonal planar b) tetrahedral c) trigonal pyramidal d) square planar e) bent 7. What are the approximate bond angles in the following compound a) P = 120q, Q = 109.5q, R = 120q b) P = 109.5q, Q = 120q, R = 120q c) P = 109.5q, Q = 109.5q, R = 120q d) P = 109.5q, Q = 109.5q, R = 109.5q e) P = 120q, Q = 120q, R = 120q P Q R N O 8. What is the correct name for the following compound a) (E)-3,5-dimethyl-3-hexene b) (Z)-3,5-dimethyl-3-hexene c) (Z)-2,4-dimethyl-3-hexene d) (E)-2-ethyl-4-methyl-2-pentene e) (Z)-2-ethyl-4-methyl-2-pentene 9. What is the ground state electronic configuration of K a) 1s2 2s8 3s8 4s1 b) 1s2 2s2 2p6 2d10 c) 1s2 2s2 2p8 3s2 3p5 d) 1s2 2s2 2p6 3s2 3p6 3d1 e) 1s2 2s2 2p6 3s2 3p6 4s1 10. What is the correct stick representation of (E)-3-methyl-3-hexene A B C D E Correct answers: 1D, 2C, 3B, 4A, 5B, 6A, 7C, 8C, 9E, 10E ō : – A 三 平 : 0 : : 四 体 三 锥体 形 平 弯曲 c 1 09 . 5 1 2 0 1 0 9 . 5 [ meth 1 hex 6eth 2 hept 7 prop 3 oct 8 but 4 non 9 pent 5 dec 1 0 E S : 2 p : 6 d : 1 0 f : 1 41 5 25 2 P 15 2 5 2 2P 35 3p 6 3d ‘ 3 5 3 P 3d 4 5 4 P 4d 4f E Chem1011 Sample Quiz 2 (ii) 1. What is the molecular formula of the following compound a) C9H9N2O b) C9H10N2O c) C10H10N2O d) C10H11N2O e) C10H12N2O N N O Questions 2 and 3 refer to the following experiment. 0.050 M zinc nitrate solution (100 mL) is added to 0.040 M potassium carbonate solution (80 mL). 2. Presuming a complete reaction occurs, what amount (in mol) of ZnCO3 precipitates a) 0.0016 b) 0.0032 c) 0.0040 d) 0.0050 e) 0.0082 3. What is the final concentration of Zn2+(aq) ions remaining in solution after the reaction a) 0.0018 M b) 0.0180 M c) 0.18 M d) 0.0010 M e) 0.010 M 4. Hydrogen bromide reacts with manganese dioxide according to the following equation. MnO2(s) + 4HBr(g) o MnBr2(s) + 2H2O(g) + Br2(g) What mass of bromine can be produced from 6.5 g of hydrogen bromide a) 12.8 g b) 6.42 g c) 3.21 g d) 1.60 g e) 0.802 g 5. One resonance structure of ozone is shown below. What is the bond order of the oxygen– oxygen bond in O3 a) 1.0 b) 1.33 c) 1.5 d) 1.66 e) 2.0 O OO E .it ※ CCHfcfc-HHHCc-HfitiHHZnlNO3bk.CO 3 B n = C U= o.0 5 xo.li o.00 5 n = ( v = o.04 x o.08 = 0 0 0 32 03 1 2n lN0312 +1 kW 3 → 1 ZnGt 2 KN03 1 : 1 Zi 使 Znl N0312 O.0 032 mol 剩余 0.05-a0032 0 00 1 8molo.18Lc.fi穖 = 0 0 1 M cn n 1 13r ) = 紫 o.0802 81 160 o.0802 廿 o.02 0 0 6 002 0 0 6 X 1 60 = 3 . 2 0 9877 cbo dNo.is 单个 原 之间 的 键基数 : 2 bondorder =_= 1.5 6. What is the molecular geometry of the NH3 molecule a) trigonal planar b) tetrahedral c) trigonal pyramidal d) bent e) square planar 7. What are the approximate bond angles in the following compound a) P = 120q, Q = 120q, R = 120q b) P = 120q, Q = 180q, R = 120q c) P = 120q, Q = 180q, R = 109.5q d) P = 109.5q, Q = 180q, R = 120q e) P = 109.5q, Q = 120q, R = 90q R Q P C O CH3 8. What is the correct name for the following compound a) (E)-3,4,5-trimethyl-4-heptene b) (Z)-3,4,5-trimethyl-3-heptene c) (E)-3,4,5-trimethyl-3-heptene d) (E)-2-ethyl-3,4-dimethyl-2-hexene e) (Z)-2-ethyl-3,4-dimethyl-2-hexene 9. What is the ground state electronic configuration of Se a) 1s2 2s2 2p6 3s2 3p5 b) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 c) 1s2 2s2 2p6 3s2 3p6 3d10 4p4 d) 1s2 2s2 2p6 3s2 3p6 4s0 3d10 4p6 e) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p46 10. What is the correct stick representation of (Z)-3-methyl-2-pentene EDCBA Correct answers: 1E, 2B, 3E, 4, 5C, 6C, 7B, 8B, 9B, 10A H.ci : 1 1- c 2个孤电 对 H 三 锥体 B 1 80 1 20 1 20 B B i s s : 2 P : 6 d : 1 0 f : 1 4 zs z p 1 52252 p 63523p 6 3d 1 0 45 48 4 3 5 3 P 3d 4 5 4 P 4d 4f A
