e4_f06 - CHE 131 Final Exam, Fall 2006 Multiple Choice, 2...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CHE 131 Final Exam, Fall 2006 Multiple Choice, 2 points each Identify the letter of the choice that best completes the statement or answers the question. 1. All atoms, isotopes, and ions of chlorine have the same A. number of electrons. B. number of protons. C. mass. D. number of neutrons. E. number of protons and electrons. 2. What is the total number of unpaired electrons in the ground state of the oxygen atom? A. 0 B. 1 C. 2 D. 3 E. 4 3. Lithium, beryllium, sodium, and magnesium are neighbors in the Periodic Table as shown below. Which one of the following statements is correct about these four elements? Group 1 Group 2 Li Be Na Mg A. Li most resembles Be in chemical properties. B. Na and Be have about the same chemical activity. C. The first ionization energy of Na should be the lowest of the four elements. D. Li and Na are metals while Be and Mg are metalloids. E. Mg should be the largest of the four elements because it has the most electrons. 4. Barium sufate, BaSO 4 , has A. only covalent bonds. B. only ionic bonds. C. only metallic bonds. D. ionic and covalent bonds. E. ionic and metallic bonds. 5. Which one of the following molecules is most polar? A. H 2 B. F 2 C. HF D. ClF E. CO
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6. Silane gas, SiH 4 , has a higher boiling point than methane gas, CH 4 , because A. Dispersion forces are stronger in silane. B. Dipole-dipole forces are stronger in silane. C. Ionic bonds are stronger in silane. D. Hydrogen bonds are stronger in silane. E. Silane has a larger molar mass. 7. When acetylene, C 2 H 2 (g) is burned, the products are carbon dioxide and water vapor. In the balanced equation for this reaction, what are the coefficients of acetylene, dioxygen O 2 , carbon dioxide, and water, respectively. A. 2,5,4,2 B. 1,2,2,1 C. 1,5,2,2 D. 1,1,1,1 E. 2,2,4,2 8. Consider the following balanced reaction equation: 5NaN 3 (s) + NaNO 3 (aq) 3Na 2 O(s) + 8N 2 (g). If 3.0 moles of NaN 3 and 3.0 moles of NaNO 3 react, how many moles of N 2 are produced? A. 1.9 mol B. 2.7 mol C. 0.38 mol D. 24 mol E. 4.8 mol 9. As more water is added to an aqueous solution of a strong acid with pH = 3 at 25 o C, the pH A. increases until a constant value of 7 is reached. B. decreases until a constant value of 0 is reached. C. doesn’t change. D. increases indefinitely. E. increases until a constant value of 14 is reached. 10. Which of the following is one product produced by reacting KOH and HBr? A. OH - B. H 2 O C. H 2 D. Br 2 E. KH 11. Two containers of gases labeled A and B with the same volume and pressure at room temperature are connected by a tube with a closed valve. Container B is heated to 100 o C while container A remains at room temperature. The valve is opened to connect the two chambers and then closed. After both chambers again reach room temperature with the valve remaining closed, which one of the following statements is correct? A. B will have more molecules than A.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

e4_f06 - CHE 131 Final Exam, Fall 2006 Multiple Choice, 2...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online