9. How many valence electrons does an atom of C have?
(A) 1
(B) 4
(C) 2
(D) 3

5. Determine the empirical formula for a compound that contains C, H and O. It contains 51.59% C and 35.30% O by mass. (C: 12.0 g/mol; H: 1.00 g/mol; O: 16.0 g/mol) (A) C2H6O(B) CHO(C) (D) CH4O3

6. Give the theoretical yield, in grams, of CO2 from the reaction of 4.000 moles of C8H18 with 4.000 moles of O2. (C: 12.0 g/mol； H: 1.00 g/mol； O: 16.0 g/mol) 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O (A) 112.7 g(B) 102.4 g(C) 176.0 g(D) 704.0 g ※ 試題請隨卷繳回 第1頁  亞洲大學 109 學年度學士後獸醫學系招生考試試題紙 學系別 考試科目 考試日期 時 間 學士後獸醫學系 化學(含普通化學、有機化學) 109.05.02 10:30-12:00

7. The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)? (A) 0.20 M(B) 0.40 M(C) 0.10 M(D) 0.36 M

8. How many subshells are there in the shell with n = 4? (A) 3(B) 4(C) 6(D) 18

10. Place the following in order of increasing radius. Ca2⁺ S2⁻ Cl⁻ (A) Ca2⁺ ＜ Cl⁻＜ S2⁻(B) Cl⁻ ＜ Ca2⁺ ＜ S2⁻(C) S2⁻ ＜ Cl⁻ ＜ Ca2⁺ (D) Ca2⁺ ＜ S2⁻＜ Cl⁻

11. Which of the elements listed below would most likely form a polar covalent bond when bonded to oxygen? (A) Mg(B) H(C) Al(D) O

12. Assuming the octet rule is obeyed, how many covalent bonds will an oxygen atom form to give a formal charge of zero? (A) 0(B) 1(C) 2(D) 3

13. Which of the following Lewis structures is incorrect? (A) (B) (C) (D)

14. In the best Lewis structure for NO +, what is the formal charge on the N atom? (A) -1(B) 0(C) +1(D) +2

15. Which of the elements listed below is most likely to exhibit an expanded octet in its compounds? (A) O(B) S(C) Na(D) C