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.Indicate whether the listed compound is ionic(A) or covalent(B). 1. (3 points) NH4Cla. Ionic b. Covalent 2. (3 points) NO2a. Ionic b. Covalent 3. (3 points) MgBr2a. Ionic b. Covalent 4. (4 points) Substances that readily dissociate and completely dissolve in solution are calleda. weak electrolytes and make many ions in solution.b. strong electrolytes and make many ions in solution.c. strong electrolytes and make few ions in solution.d. weak electrolytes and make few ions in solution.Name: ________________________ Form: A2 5. (4 points) Which two of the atoms below have the same number of neutrons? 1634S,1632S,1735Cl,1838Ara.1634S and 1735Clb.1632S and 1735Clc.1735Cl and 1838Ard.1632S and 1838Are.1634S and 1632S 6. (4 points) At 0.967 atm, the height of mercury in a barometer is 0.735 m. If the mercury were replaced with water, what height of water (in meters) would be supported at this pressure? The densities of Hg and H2O are 13.5 g/cm3 and 0.997 g/cm3, respectively.a. 0.760 mb. 13.1 mc. 0.735 md. 0.0546 me. 9.95 m 7. (4 points) Identify the reducing agent in the reaction Al(s) + Fe2O3(s) → Fe(s) + Al2O3(s) a. Fe(s)b. Fe2O3(s) c. Al2O3(s) d. Al(s)Name: ________________________ Form: A3 8. (5 points) A nail is coated with a 0.053 cm thick layer of zinc. The surface area of the nail is 8.59 cm2. The density of zinc is 7.13 g/cm3. How many zinc atoms are used in the coating?a. 3.0 × 1022 atomsb. 2.0 × 1024 atomsc. 3.8 × 1022 atomsd. 5.9 × 1020 atomse. 1.3 × 1026 atoms 9. (5 points) A 20.0 mL of 0.500 M HCl are mixed with 15.0 mL of 0.750 M NaOH. The following is(are) true:a. The resulting solution is acidic b. The resulting solution is basicc. HCl is being reducedd. HCl is being oxidized e. More than one of these are true 10. (5 points) Sulfur hexafluoride is produced by reacting elemental sulfur with fluorine gas. S8(s) + 24 F2(g) → 8 SF6(g)What is the percent yield if 18.3 g SF6 is isolated from the reaction of 10.0 g S8 and 30.0 g F2?a. 54.6%b. 47.6%c. 45.8%d. 40.2%e. 61.0%Name: ________________________ Form: A4 11. (4 points) A magnesium ion has ____ electrons.a. 10b. 12c. 14d. 11e. 13 12. (4 points) Which of the following relationships is/are CORRECT for gases?1. The moles of a gas is inversely proportional to its volume (at constant pressure).2. The volume of a gas is inversely proportional to its temperature in kelvin (at constant pressure).3. The pressure of a gas is directly proportional to its temperature in kelvin (at constant volume).a. 1 onlyb. 2 onlyc. 3 onlyd. 1 and 2e. 2 and 3 13. (5 points) Write a balanced chemical equation for the following reaction in an acidic solution. MnO4–(aq) + Fe(s) → Mn2+(aq) + Fe2+(aq)a. MnO4–(aq) + Fe(s) + 16 H+(aq) → Mn2+(aq) + Fe2+(aq) + 8 H2O(™)b. 2 MnO4–(aq) + 5 Fe(s) + 16 H+(aq) → 2 Mn2+(aq) + 5 Fe2+(aq) + 8 H2O(™)c. 2 MnO4–(aq) + Fe(s) + 16 H+(aq) → 2 Mn2+(aq) + Fe2+(aq) + 8 H2O(™)d. MnO4–(aq) + Fe(s) → Mn2+(aq) + Fe2+(aq) + 4 H2O(™)e. MnO4–(aq) + 5 Fe(s) + 16 H+(aq) → Mn2+(aq) + 5 Fe2+(aq) + 8 H2O(™)Name: ________________________ Form: A5 14. (5 points) Boron has two stable isotopes with masses of 10.01294 u and 11.00931 u. The average molar mass of boron is 10.81 u. What is the percent abundance of each isotope?a. 48.6% B-10 and 51.4% B-11b. 80.0% B-10 and 20.0% B-11c. 18.9% B-10 and 81.1% B-11d. 20.0% B-10 and 80.0% B-11e. 81.1% B-10 and 18.9% B-11 15. (5 points) If 5.15 g Fe(NO3)3 is dissolved in enough water to make exactly 150.0 mL of solution, what is the molar concentration of nitrate ion?a. 0.426 Mb. 0.0343 Mc. 0.313 Md. 0.00319 Me. 0.142 M 16. (5 points) What is the balanced equation for hydrogen phosphate ion (HPO42–) acting as a Brønsted base in a reaction with water?a. HPO42–(aq) + H2O(™) → H2PO4–(aq) + H3O+(aq)b. HPO42–(aq) + H2O(™) → PO43–(aq) + OH–(aq)c. HPO42–(aq) + H2O(™) → PO43–(aq) + H3O+(aq)d. HPO42–(aq) + H2O(™) → H2PO4–(aq) + OH–(aq)e. HPO42–(aq) + H2O(™) → H3PO52–(aq)Name: ________________________ Form: A6 17. (4 points) Consider the reaction: 3 MnO2 (s) + 4 Al (s) → 3 Mn (s) + 2 Al2O3 (s)How many moles of which reagent are left over when 3.5 moles of MnO2 reacts with 4.5 moles of Al. Assume that the reaction goes to completion.a. 0.16 mol Alb. 1.5 mol Alc. 0.13 mol MnO2d. 0.5 mol MnO2e. 0.5 mol Al 18. (4 points) When the following equation is balanced, what is the sum of the coefficients? Al2(SO4)3 + Ca(OH)2 → Al(OH)3 + CaSO4a. 4b. 8c. 9d. 10e. 3 19. (5 points) A mass of 3.051 g of a metal carbonate, MCO3, is heated to drive off carbon dioxide. The remaining metal oxide has a mass of 1.458 g. MCO3(s) → MO(s) + CO2(g)What is the identity of the metal?a. Nib. Bac. Cad. Coe. MgName: ________________________ Form: A7 20. (4 points) Which of the following statements concerning water, H2O, is/are true?1. H2O is a non-polar solvent.2. H2O is a chemical compound.3. The percentage of hydrogen in H2O is independent of where the water is obtained.a. 1 onlyb. 2 onlyc. 3 onlyd. 1 and 2e. 2 and 3 21. (4 points) What is the correct name for CaI2?a. calcium diiodineb. calcium iodidec. calcium diiodided. iodine calcidee. calcium(II) iodide 22. (5 points) What is the net ionic equation for the reaction of aqueous calcium acetate and aqueous sodium carbonate?a. Na+(aq) + CH3CO2–(aq) → NaCH3CO2(aq)b. Ca2+(aq) + CO32–(aq) → CaCO3(s)c. Ca2+(aq) + 2 CH3CO2–(aq) → Ca(CH3CO2)2(s)d. Na+(aq) + CH3CO2–(aq) → NaCH3CO2(s)e. Ca2+(aq) + 2 Na+(aq) → CaNa2(s)Name: ________________________ Form: A8 23. (6 points) A compound is known to contain only carbon, hydrogen, and oxygen. Combustion of 5.19 g of this compound in oxygen yields 12.4 g of CO2 and 2.55 g of H2O. What is the empirical formula of the compound?a. C2H2Ob. C3H6Oc. C3H3Od. C3H6O2e. C3H3O2ID: A1Exam 1Answer SectionMULTIPLE CHOICE 1. ANS: A PTS: 3 2. ANS: B PTS: 3 3. ANS: A PTS: 3 4. ANS: B PTS: 4 5. ANS: A PTS: 4 6. ANS: E PTS: 4 7. ANS: D PTS: 4 8. ANS: A PTS: 5 9. ANS: B PTS: 5 10.