Test 2 Name Chemistry 10 Dr Kline 1 April 2004 Row Seat Lab 8 00 10 30 This test consists of a combination of multiple choice and other questions There should be a total of 19 questions on five pages please check to make sure that they are all here You may use the equation 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 Shared calculators will be confiscated It is OK to tear off the periodic table page just make sure to do the problems on the other side of the page reattach it to your test and write your name on it Multiple Choice Questions Each of the following 15 questions is worth three points for a total of 45 points There is only one correct answer for each question unless it is stated otherwise for a given question Answer each question by circling the letter s corresponding to the correct choice s in other words if there is more than one correct answer circle all of them It is not necessary to show work for these questions however you may write on the exam 1 How a b c d e many 11 22 6 6 x 1 3 x 6 0 x atoms of oxygen are in one mole of sucrose C12H22O11 1024 1025 1023 2 What is the molar mass of Ca3 PO4 2 a 325 0 g mole b 310 2 g mole c 175 1 g mole d 135 1 g mole e 215 2 g mole 3 Which of the following compounds has the highest percent by mass of hydrogen a HCl b H2O c H2S d HF e HBr 4 What is the mass of one atom of platinum to three significant figures a 3 24 x 10 22 g b 1 77 x 10 22 g c 106 g d 195 g e 5 66 x 1021 g f 3 09 x 1021 g 5 Which of the following compounds have the same percent composition as glucose C6H12O6 More than one answer may be correct a ribose C5H10O5 b fructose C6H12O6 c sucrose C12H22O11 d none of them Page 1 of 5 Test 1A Chem 10 6 What is the correct volume reading units of mL a b c d e f for the buret below assuming that the 4 and 5 are in 4 6 mL 4 62 mL 5 38 mL 5 4 mL 5 6 mL 4 4 mL 7 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 be correct 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 4 b 5 c 8 d 10 e 13 10 A precipitate is formed when aqueous solutions of sodium sulfide and copper II nitrate are combined What is the formula of this precipitate a Na2S b CuS c Cu NO3 2 d NaNO3 e NaCu 11 What is the correctly balanced net ionic equation for the reaction that occurs when aqueous solutions 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 be correct a PbS b K2S c Ag2CO3 Page 2 of 5 Test 1A Chem 10 d None of them 13 Which of the following would react with HCl aq to give a gas More than one answer may be correct a Na2S b Ag2SO3 c NH4Cl d none of them 14 Suppose that aqueous solutions of each of the following pairs of reagents are combined Which will 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 them 15 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 Questions Each of the following is worth the indicated number of points for a total of 55 points Please show work with units to receive credit unless instructed otherwise Also be sure to provide all of the information requested for each question 16 24 points Complete the following table by providing names for formulas and formulas for names Please use the naming systems discussed in lecture and lab Formula Name a Manganese IV nitride b c Ca ClO 2 NH4 2S d e PbCrO4 IBr3 f Hydrosulfuric acid g Aluminum carbonate h KrF6 i Mercury I nitrite j k HC2H3O2 aq Lithium permanganate l Na2SO4 10H2O Page 3 of 5 Test 2A Chem 10 17 12 points Cocaine has a molecular weight of 303 36 g mole and the following percent composition 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 per metric ton The rate of exchange on Friday was 1 22753 per Euro How many atoms of zinc could you purchase for exactly one million Euros at these rates Please give your final answer 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 NiS NaOH O2 Al O2 Ba OH 2 MnO2 Fe OH 3 NiO NaCl SO2 Al2O3 H3PO4 HCl Ba3 PO4 2 MnCl2 Cl2 H2O H 2O Page 4 of 5 Test 2A Chem 10 Name TEST 2 Spring 2004 Equation and Information Sheet Conversions 1 metric ton 1000 kg Avagadro s number 6 022 x 1023 Solubility Rules for Ionic Compounds q 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 …