Name: ________________________ Class: ___________________ Date: __________ Form: A1Exam 1Multiple ChoiceIdentify the choice that best completes the statement or answers the question.Record the test form letter in the TEST FORM box on your ParSCORE form.Record your name on the top of this exam and on the scantron form.Be sure to fill out your perm ID# on your scantron correctly. Record all of your answers on the scantron form. 1. (5 points) What is the coefficient of the MnO4– ion when the following equation is balanced?MnO4– + Br –  Mn2+ + Br2 (acidic solution)a. 3b. 1c. 2d. 4e. 5 2. (4 points) HIO3(aq) would be nameda. Hydroiodic acidb. Iodic acidc. Hydrogen iodide(V) oxided. Hydrogen iodide trioxide e. Iodous acid 3. (4 points) A sample of CH2F2 with a mass of 19 g contains ________ atoms of fluorine.a. 3.3 × 1024b. 2.2 × 1023c. 4.4 ×1023d. 9.5e. 38Name: ________________________ Form: A2True/False 4. (3 points) The oxidation state of nitrogen in dinitrogen monoxide is –3.a. True b. False 5. (3 points) The oxidation state of bromine in BrF3 is 3+.a. True b. False 6. (3 points) Sodium phosphate is a strong electrolyte.a. True b. False 7. (3 points) The combustion of methane, producing carbon dioxide and water, can be considered a redox reaction.a. True b. False 8. (3 points) X – and X can be considered a pair of isotopesa. True b. FalseName: ________________________ Form: A3 9. (6 points) What is the molarity of a NaOH solution if 15.5 mL of a 0.220 M H2SO4 solution is required to neutralize a 25.0 mL sample of the NaOH solution?a. 0.136 Mb. 0.273 Mc. 0.355 Md. 42.6 Me. 0.710 M 10. (5 points) What are the spectator ions in the reaction between silver(I) nitrate and sodium hydroxide?a. Na+ and NO3–b. Ag+ and NO3–c. Na+ and OH–d. Ag+and OH–e. Ag+ and Na+ 11. (5 points) What are the respective concentrations (M) of potassium ions and phosphate ions afforded by dissolving 0.800 mol potassium phosphate in water and diluting to 1.63 L?a. 0.491 and 0.491b. 0.800 and 0.800c. 1.44 and 0.491d. 0.489 and 0.163e. 0.800 and 0.491Name: ________________________ Form: A4 12. (5 points) The net ionic equation when Al(OH)3 is mixed with nitric acid is ________.a. Al(OH)3 (s) + 3HNO3 (aq)  3H2O (l) + Al3+ (aq) + 3NO3– (aq)b. Al(OH)3 (s) + 3H+ (aq)  3H2O (l) + Al3+ (aq)c. Al(OH)3 (l) + 3HNO3 (aq)  3H2O (l) + Al(NO3)3 (aq)d. Al(OH)3 (s) + 3NO3– (aq)  3OH– (aq) + Al(NO3)3 (aq)e. Al(OH)3 (l) + 3NO3– (aq)  3OH– (aq) + Al(NO3)3 (s) 13. (5 points) A certain mass of carbon reacts with 128 g of oxygen to form carbon monoxide. ________ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions.a. 64.0b. 128c. 1280d. 256e. 25.6 14. (5 points) An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the mass number of the ion is 40 and it has 18 electrons, what is the element and how many neutrons does it have?a. S, 24 neutronsb. Ar, 24 neutronsc. Ca, 20 neutronsd.K, 19 neutronse. Ar, 22 neutronsName: ________________________ Form: A5 15. (5 points) Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?a. Li, Fb. In, Sbc. Sr, Ted. O, Se. Ti, Ne 16. (5 points) Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia:N2 (g) + 3H2 (g)  2NH3 (g)If the percent yield is 87.5%, how many moles of H2 are needed to produce 3.00 mol of NH3?a. 1.71b. 3.42c. 5.14d. 2.32e. 0.166 17. (5 points) You have 120.0 mL of a 0.275 M solution of NaCl sitting in a beaker. After several days you test the solution and find that it has a concentration of 0.412 M. How much water must have evaporated? (Assume volumes are additive.)a. 39.9 mLb. 80.1 mLc. 120. mLd. 200 mLe. 119 mLName: ________________________ Form: A6 18. (6 points) Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:CaO (s) + H2O (l)  Ca(OH)2 (s)A 3.50-g sample of CaO is reacted with 3.38 g of H2O. How many grams of water remain after completion of reaction?a. 0.00 gb. 0.00694 gc. 2.25 gd. 0.125 ge. 1.04 g 19. (5 points) A compound contains 40.0% C, 6.71% H, and 53.29% O by mass. The molecular weight of the compound is 60.05 amu. The molecular formula of this compound is ________.a. C2H3O4b. C2H2O4c. CH2Od. CHO2e. C2H4O2 20. (5 points) If all of the chloride in a 5.000-g sample of an unknown metal chloride is precipitated as AgCl with 70.90 mL of 0.2010 M AgNO3, what is the percentage of chloride in the sample?a. 50.55%b. 1.425%c. 10.10%d. 20.22%e. none of theseName: ________________________ Form: A7 21. (4 points) The atomic weight of copper on the periodic table, which has two naturally occurring isotopes, is listed as 63.5. One of the isotopes has an atomic mass of 62.9 amu and constitutes 69.1% of the copper isotopes. The atomic mass of the second isotope is ________ amu. a. 64.1b. 63.8c. 28.1d. 63.2e. 64.8 22. (6 points) Combustion of a 0.9827 g sample of a compound containing only carbon, hydrogen, and oxygen produced 1.900 g of CO2 and 1.070 g of H2O. What is the empirical formula of the compound?a. C4H10O2b. C2H5O2c. C2H5Od. C4H11O2e. C4H10OID: A1Exam 1Answer SectionMULTIPLE CHOICE 1. ANS: C PTS: 5 2. ANS: B PTS: 4 3. ANS: C PTS: 4 4. ANS: B PTS: 3 5. ANS: A PTS: 3 6. ANS: A PTS: 3 7. ANS: A PTS: 3 8. ANS: B PTS: 3 9. ANS: B PTS: 6 10. ANS: A PTS: 5 11. ANS: C PTS: 5 12. ANS: B PTS: 5 13. ANS: D PTS: 5 14. ANS: C PTS: 5 15. ANS: D PTS: 5 16. ANS: C PTS: 5 17. ANS: A PTS: 5 18. ANS: C PTS: 6 19. ANS: E PTS: 5 20. ANS: C PTS: 5 21. ANS: E PTS: 4 22. ANS: D PTS: