Page 1 of 5 – Test 1A – Chem 10Test 2 Name ____________________________Chemistry 10 – Dr. Kline1 April 2004 Row ________ Seat ________ Lab 8:00 10:30This test consists of a combination of multiple choice and other questions. There should be a total of19 questions on five pages; please check to make sure that they are all here. You may use theequation/information sheet and any periodic table provided (page 6). Do not use your own tables,scratch paper or other information. Do not share your calculator. Please turn off all cell phones,pagers and other communication devices; if they make noise, they will be confiscated. Sharedcalculators will be confiscated. It is OK to tear off the periodic table page; just make sure to do theproblems on the other side of the page, reattach it to your test, and write your name on it.Multiple Choice QuestionsEach of the following 15 questions is worth three points, for a total of 45 points. There is only onecorrect answer for each question unless it is stated otherwise for a given question. Answer eachquestion by circling the letter(s) corresponding to the correct choice(s); in other words, if there ismore than one correct answer, circle all of them. It is not necessary to show work for thesequestions; however, you may write on the exam.1. How many atoms of oxygen are in one mole of sucrose, C12H22O11?a. 11b. 22c. 6.6 x 1024d. 1.3 x 1025e. 6.0 x 10232. What is the molar mass of Ca3(PO4)2?a. 325.0 g/moleb. 310.2 g/molec. 175.1 g/moled. 135.1 g/molee. 215.2 g/mole3. Which of the following compounds has the highest percent by mass of hydrogen?a. HClb. H2Oc. H2Sd. HFe. HBr4. What is the mass of one atom of platinum to three significant figures?a. 3.24 x 10-22 gb. 1.77 x 10-22 gc. 106 gd. 195 ge. 5.66 x 1021 gf. 3.09 x 1021 g5. Which of the following compounds have the same percent composition as glucose, C6H12O6 ?More than one answer may be correct.a. ribose, C5H10O5b. fructose, C6H12O6c. sucrose, C12H22O11d. none of themPage 2 of 5 – Test 1A – Chem 106. What is the correct volume reading for the buret below, assuming that the “4” and “5” are inunits of mL? a. 4.6 mLb. 4.62 mLc. 5.38 mLd. 5.4 mLe. 5.6 mLf. 4.4 mL7. Which of the following properties of oxygen gas allowed you to store the bottles of oxygen“mouth-up” on the lab bench during last weeks “Properties of Oxygen” experiment?a. Oxygen is not soluble in water.b. Oxygen is soluble in water.c. Oxygen is denser than air.d. Oxygen is less dense than air.e. Oxygen is agoraphobic (abnormally afraid of open or public spaces).8. Which of the following is/are oxidation-reduction reactions? More than one answer may becorrect.a. K(s) + H2O(l) ‡ KOH(aq) + H2(g)b. C4H10(g) + O2(g) ‡ CO2(g) + H2O(l)c. FeCl3(aq) + NaOH(aq) ‡ Fe(OH)3(s) + NaCl(aq)d. none of them 9. What is the coefficient in front of the water when the equation C5H10(g) + O2(g) ‡ CO2(g) +H2O(l) is correctly balanced?a. 4b. 5c. 8d. 10e. 1310. A precipitate is formed when aqueous solutions of sodium sulfide and copper(II) nitrate arecombined. What is the formula of this precipitate?a. Na2Sb. CuSc. Cu(NO3)2d. NaNO3e. NaCu11. What is the correctly balanced net ionic equation for the reaction that occurs when aqueoussolutions of barium hydroxide and hydrobromic acid are combined?a. Ba(OH)2(aq) + 2HBr(aq) ‡ BaBr2(aq) + 2H2O(l)b. Ba2+(aq) + 2OH- (aq) + 2H+(aq) + 2Br-(aq) ‡ Ba2+(aq) + 2Br-(aq) + 2H2O(l)c. 2OH- (aq) + 2H+(aq) ‡ 2H2O(l)d. OH- (aq) + H+(aq) ‡ H2O(l)12. Which of the following compounds is/are insoluble in water? More than one answer may becorrect.a. PbSb. K2Sc. Ag2CO3Page 3 of 5 – Test 2A – Chem 10d. None of them.13. Which of the following would react with HCl(aq) to give a gas? More than one answer may becorrect.a. Na2Sb. Ag2SO3c. NH4Cld. none of them14. Suppose that aqueous solutions of each of the following pairs of reagents are combined. Whichwill result in a reaction? More than one answer may be correct.a. Aluminum nitrate + potassium hydroxide ‡b. Ammonium chloride + lead(II) nitrate ‡c. Iron(III) nitrate and sodium sulfate ‡d. none of them15. Given that the reaction represented by the net ionic equation Sn(s) + Pb2+(aq) ‡ Pb(s) +Sn2+(aq) occurs as written, which of the following is true?a. Tin is more easily oxidized than lead.b. Lead is more easily oxidized than tin.c. It is impossible to tell.Problems and QuestionsEach of the following is worth the indicated number of points, for a total of 55 points. Please showwork, with units, to receive credit unless instructed otherwise. Also, be sure to provide all of theinformation requested for each question.16. 24 points Complete the following table by providing names for formulas and formulas fornames. Please use the naming systems discussed in lecture and lab.FormulaNamea.Manganese(IV) nitrideb.Ca(ClO)2c.(NH4)2Sd.PbCrO4e.IBr3f.Hydrosulfuric acidg.Aluminum carbonateh.KrF6i.Mercury(I) nitritej.HC2H3O2(aq)k.Lithium permanganatel.Na2SO4•10H2OPage 4 of 5 – Test 2A – Chem 1017. 12 points Cocaine has a molecular weight of 303.36 g/mole and the following percentcomposition by mass: 67.31% carbon, 6.98% hydrogen, 4.62% nitrogen, and 21.10% oxygen.Determine the empirical and molecular formulas of cocaine.18. 9 points The price of zinc on the London Metal Exchange on Friday (4/26) was $1081.00 permetric ton. The rate of exchange on Friday was $1.22753 per Euro (€). How many atoms ofzinc could you purchase for exactly one million Euros at these rates? Please give your finalanswer in scientific notation and to three significant figures. 1 metric ton = 1000 kg (exactly).19. 10 points Balance each of the following equations. State labels are deliberately left out.FeCl3 + NaOH ‡ Fe(OH)3 + NaClNiS + O2 ‡ NiO + SO2Al + O2 ‡ Al2O3Ba(OH)2 + H3PO4 ‡ Ba3(PO4)2 + H2OMnO2 + HCl ‡ MnCl2 + Cl2 + H2OPage 5 of 5 – Test 2A – Chem 10Name _________________________________TEST #2 – Spring 2004 – Equation and Information SheetConversions1 metric ton = 1000 kg.Avagadro’s number = 6.022 x 1023Solubility Rules for Ionic Compoundsq Compounds containing Group IA ions, ammonium, acetate and nitrate are always soluble.q Compounds containing chloride, bromide, and iodide are soluble, except when paired with silver,lead(II), and mercury(I) ions.q Compounds containing sulfate are soluble, except when paired