XIX. Chemistry, High School

1 XIX. chemistry , High School343 High School chemistry TestThe spring 2013 high School chemistry test was based on learning standards in the chemistry content strand of the Massachusetts Science and Technology/Engineering Curriculum Framework (2006). These learning standards appear on pages 69 73 of the Science and Technology/Engineering Curriculum Framework is available on the Department website at test results are reported under the following four MCAS reporting categories: Atomic Structure and Periodicity Bonding and Reactions Properties of Matter and Thermochemistry Solutions, Equilibrium, and Acid-Base TheoryTest SessionsThe high School chemistry test included two separate test sessions, which were administered on consecutive days. Each session included multiple-choice and open-response Materials and ToolsEach student taking the high School chemistry test was provided with a chemistry Formula and Constants Sheet/Periodic Table of the Elements.

2 Copies of both sides of this formula sheet follow the final question in this student also had sole access to a calculator with at least four functions and a square-root use of bilingual word-to-word dictionaries was allowed for current and former English language learner students only, during both chemistry test sessions. No other reference tools or materials were InformationThe table at the conclusion of this chapter indicates each item s reporting category and the framework learning standard it assesses. The correct answers for multiple-choice questions are also displayed in the 1 DIRECTIONSThis session contains twenty-one multiple-choice questions and two open-response questions. Mark your answers to these questions in the spaces provided in your Student Answer Booklet.

3 You may work out solutions to multiple-choice questions in the test :281323 A Common EQ 1 An equation for a chemical reaction is shown (g)OHO() (g)kJl Which of the following statements indicates that this reaction is exothermic?A. Energy is A compound is The reactants are two different There are more reactants than :298325 B Common EQ 2 A student observed that the rate of a chemical reaction increased as the temperature of the system increased. Which of the following statements best explains why thermal energy caused an increase in the reaction rate?A. The surface area of the product particles The collision rate of the reactant particles The concentrations of the reactant particles The concentrations of the product particles Session 1 MCAS_2013_Gr10_CHEM_RIDID:281214 D Common EQ 3 Which of the following statements best describes the current atomic theory?

4 A. Electrons move in circular orbits around the Electrons are held in an atom by their attraction to each Electrons are evenly distributed throughout a mixture of positive and neutral Electrons exist in specific energy levels and have both wave and particle :273012 D Common EQ 4 Which of the following molecules has a nonpolar covalent bond?A. H BrB. H ClC. H FD. H HID:244829 [opt_ A Common EQ 5 Which of the following equations shows a fusion reaction?A. 3H12H11n04He2B. 238U92234Th904He2C. 0e24Na1124Mg12 1D. 235U921n092Kr36141Ba5631n0 346 chemistry Session 1 MCAS_2013_Gr10_CHEM_RIDID:287594 A Common EQ 6 Which of the following statements describes what happens in a buffer solution when a strong acid is added?A. The H ions from the strong acid combine with basic ions in the The H ions from the strong acid combine with acidic ions in the The OH ions from the strong acid combine with acidic ions in the The OH ions from the strong acid combine with basic ions in the :229548 D Common EQ 7 How many atoms of oxygen (O) are required to form two molecules of sulfuric acid (H2SO4)?]

5 A. 2B. 4C. 6D. 8347 chemistry Session 1 MCAS_2013_Gr10_CHEM_RIDID:261464 B Common EQ 8 Magnesium metal reacts with iron(III) sulfate to produce iron metal and magnesium sulfate, as shown in the equation below. The molar mass of iron(III) sulfate is (s)FeSOaqFe (s)3 MgSOaq2434()()() How many grams of iron(III) sulfate are needed to completely react g of magnesium? A. gB. 33 gC. 99 gD. 300 gID:264320 C Common EQ 9 In an experiment, a student mixes two compounds, X and Y, which react to give off energy and form compound Z, as shown in the equilibrium equation After the reaction reaches equilibrium, which of the following changes would shift the equilibrium to the left?A. adding more compound X to the equilibriumB. adding more compound Y to the equilibriumC.

6 Increasing the temperature of the equilibriumD. decreasing the temperature of the equilibrium ID:252675 C Common EQ 10 When a sample of a gas is cooled, it condenses into a liquid. In which of the following ways do the molecules of the original gas sample compare with the molecules of the liquid?A. The molecules are larger as a gas than they are as a The molecules weigh less as a gas than they do as a The molecules move faster as a gas than they do as a The molecules are closer together as a gas than they are as a Session 1 MCAS_2013_Gr10_CHEM_RIDQ uestion 11 is an open-response question. BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION. Show all your work (diagrams, tables, or computations) in your Student Answer Booklet. If you do the work in your head, explain in writing how you did the your answer to question 11 in the space provided in your Student Answer :273070 Common EQ 11 A page from a lab notebook is shown below.

7 The page displays data needed to find the empirical formula of a of crucibleMass of crucible and iron powderMass of iron powderMass of sulfur added to crucibleMass of crucible and contentsafter reactionMass of iron-sulfur gya. Calculate the values for x and y. Show your calculations and include units in your Assume all the iron and sulfur reacted to form an iron-sulfur compound. Calculate the number of moles of sulfur and the number of moles of iron that reacted to form the compound. Show your calculations and include units in your Determine the empirical formula for the iron-sulfur compound. Show your calculations or explain your Session 1 MCAS_2013_Gr10_CHEM_RIDMark your answers to multiple-choice questions 12 through 22 in the spaces provided in your Student Answer Booklet.

8 Do not write your answers in this test booklet, but you may work out solutions to multiple-choice questions in the test :244815 C Common EQ 12 Which of the following equations shows a chemical change?A. HOheatHOg22()()lB. HOHO sheat22()()lC. HONaO(sNaaq2OH(aqheat222())()l)D. HONaCl(sNa(aqCl(aqHO22())))()llID:280897 [opt_a0 A Common EQ 13 Which of the following is a Lewis dot structure for hydrogen iodide (HI)?A. HIB. HIC. HID. HIID:281317 B Common EQ 14 Which of the following elements has both metallic and nonmetallic properties?A. ArB. GeC. MgD. S350 chemistry Session 1 MCAS_2013_Gr10_CHEM_RIDID:258906 C Common EQ 15 Uranium-234 decays to lead-214 through a series of alpha decays. Which of the following is the total number of alpha particles emitted in this decay series?]

9 A. 1B. 2C. 5D. 10ID:274049 A Common EQ 16 The chemical equation below represents the reaction of 1 mol of hydrogen gas (H2) with 1 mol of chlorine gas (Cl2) in a sealed container at STP. The reaction produces 2 mol of hydrogen chloride gas (HCl) in the sealed 1 Cl2 2 HCl What is the pressure in the container at standard temperature after the reaction is complete?A. 1 atm B. 2 atm C. 3 atmD. 4 atm 351 chemistry Session 1 MCAS_2013_Gr10_CHEM_RIDID:226997 [opt_a01, D Common EQ 17 Some manufacturers place rubber plugs in the bottoms of pressurized aerosol cans to prevent structural failure if the cans are exposed to excessive heat. The normal pressure inside an aerosol can is atm at 27 C. When the temperature of the gas in the can is increased to 250 C, the pressure reaches atm and the plug pops out.]

10 Which of the following graphs best shows the relationship of pressure to the temperature inside the can?A. Temperature ( C)Pressure (atm) C. Temperature ( C)Pressure (atm) Temperature ( C)Pressure (atm) D. Temperature ( C)Pressure (atm) Session 1 MCAS_2013_Gr10_CHEM_RIDID:281282 C Common EQ 18 A student puts an ice cube into a beaker and allows it to melt. Which of the following statements best describes what happens to the water molecules during this investigation?A. The molecules move apart until the entire beaker is The molecules move apart until they are no longer touching each The molecules become randomly arranged and can slide past each The molecules become arranged in a pattern and maintain fixed :229556 B Common EQ 19 The diagram below shows a partial periodic The electron configuration of oxygen is 1s22s22p4.