Transcription
4/22/2016Barron's Regents Exam PrepNameMAY 2, 2016REVIEW: CHEMISTRY I & 2Ms. Narvaez1. According to one acid-base theory, water can act as a base because a water molecule can1. donate an H ion3. donate an H- ion2. accept an H ion4. accept an H- ion2. Which ion in the ground state has the same electron configuration as an atom of argon in the ground state?1. A13 3. K 2. O2-4. F-3. An aqueous solution has a mass of 490 grams containing 8.5 10-3 gram of calcium ions. The concentration of calcium ions in this solution is1. 4.3 ppm3. 17 ppm2. 8.5 ppm4. 34 ppm4. Compared to distilled water, an aqueous salt solution has1. better electrical conductivity3. a lower boiling point at standard pressure2. poorer electrical conductivity4. a higher freezing point at standard pressure5. What is the volume of 0.30 M NaOH(aq) needed to completely neutralize 15.0 milliliters of 0.80 M HCl(aq)?1. 3.6 mL3. 20. mL2. 5.6 mL4. 40. mL6. An open flask is half filled with water at 25oC. Phase equilibrium can be reached after1. more water is added to the flask3. the temperature is decreased to 15oC2. the flask is stoppered4. the temperature is increased to 35oC7. A compound is broken down by chemical means during1. chromatography3. electrolysis2. distillation4. filtration8. Which list includes three types of chemical formulas for organic compounds?1. covalent, metallic, isotopic3. empirical, structural, isotopic2. covalent, metallic, molecular4. empirical, structural, molecular9. What is the chemical formula of iron(III) sulfide?1. FeS3. FeSO32. Fe2S34. Fe2(SO3)310. Given the balanced equation representing a reaction:4Al(s) 3O2(g) 2Al2O3(s)How many moles of Al(s) react completely with 4.50 moles of O2(g) to produce 3.00 moles of Al2O3(s)?http://barronsregents.com/exams/exam maint.print custom1/12
4/22/2016Barron's Regents Exam Prep1. 1.50 mol3. 6.00 mol2. 2.00 mol4. 4.00 mol11. What is the percent composition by mass of hydrogen in NH4HCO3 (gram-formula mass 79 grams/mole)?1. 5.1%3. 10.%2. 6.3%4. 50.%12. Which formula represents strontium phosphate?1. SrPO43. Sr2(PO4)32. Sr3PO84. Sr3(PO4)213. The chemical formula for nickel (II) bromide is1. Ni2Br3. N2Br2. NiBr24. NBr214. Given the reaction: . . . (see image)How many moles of C6H12O6(s) are needed to produce 24 moles of carbon dioxide?1. 1.0 mole3. 24 moles2. 12 moles4. 4.0 moles15. The percent by mass of hydrogen in NH3 is equal to16. What is the empirical formula for the compound C6H12O6?1. CH2O3. C3H6O32. C2H4O24. C6H12O617. Given the balanced equation representing a reaction:F2(g) H2(g) -- 2HF(g)What is the mole ratio of H2(g) to HF(g) in this reaction?1. 1:13. 2:12. 1:24. 2:318. Which formula represents lead(II) chromate?1. PbCrO43. Pb2CrO42. Pb(CrO4)24. Pb2(CrO4)3http://barronsregents.com/exams/exam maint.print custom2/12
4/22/2016Barron's Regents Exam Prep19. Which substance can be decomposed by chemical means?1. aluminum3. silicon2. octane4. xenon20. Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. Which two masses produce this answer?1. 210.10 g 235.100 g3. 210.1 g 235.1 g2. 210.100 g 235.10 g4. 210.10 g 235.10 g21. A student measures the mass and volume of a piece of aluminum. The measurements are 25.6 grams and 9.1 cubic centimeters. The student calculates thedensity of the aluminum. What is the percent error of the student's calculated density of aluminum?1. 1%3. 3%2. 2%4. 4%22. The accepted value for the percent by mass of water in a hydrate is 36.0%. In a laboratory activity, a student determined the percent by mass of water in thehydrate to be 37.8%. What is the percent error for the student's measured value?1. 5.0%3. 1.8%2. 4.8%4. 0.05%23. Which kelvin temperature is equal to 56oC?1. –329 K3. 217 K2. –217 K4. 329 K24. Which quantity of heat is equal to 200. joules?1. 20.0 kJ3. 0.200 kJ2. 2.00 kJ4. 0.0200 kJ25. Which of these elements has physical and chemical properties most similar to silicon (Si)?1. germanium (Ge)3. phosphorus (P)2. lead (Pb) (4)4. chlorine (Cl)26. The elements in the Periodic Table are arranged in order of increasing1. atomic number3. mass number2. atomic radius4. neutron number27. An atom of which element has the largest atomic radius?1. Fe3. Si2. Mg4. Zn28. An atom of helium-4 differs from an atom of lithium-7 in that the atom of helium-4 has1. one more proton3. two less protons2. one more neutron4. two less neutronshttp://barronsregents.com/exams/exam maint.print custom3/12
4/22/2016Barron's Regents Exam Prep29. Which elements have the most similar chemical properties?1. Si, As, and Te3. Mg, Sr, and Ba2. N2, O2, and F24. Ca, Cs, and Cu30. Which of the following Group 15 elements has the greatest metallic character?1. nitrogen3. antimony2. phosphorus4. bismuth31. Which statement correctly describes two forms of oxygen, O2 and O3?1. They have identical molecular structures and identical properties.3. They have different molecular structures and identical properties.2. They have identical molecular structures and different properties.4. They have different molecular structures and different properties.32. A metal, M, forms an oxide compound with the general formula M2O. In which group on the Periodic Table could metal M be found?1. Group 13. Group 162. Group 24. Group 1733. What is the mass number of a carbon atom that contains six protons, eight neutrons, and six electrons?1. 63. 142. 84. 2034. An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has1. more protons than neutrons3. a total of two valence electrons2. more neutrons than protons4. a total of eight valence electrons35. Which atom in the ground state requires the least amount of energy to remove its valence electron?1. lithium atom3. rubidium atom2. potassium atom4. sodium atom36. Which element is a liquid at 305 K and 1.0 atmosphere?1. magnesium3. gallium2. fluorine4. iodine37. The isotopes K-37 and K-42 have the same1. decay mode3. mass number for their atoms2. bright-line spectrum4. total number of neutrons in their atoms38. The atomic mass of titanium is 47.88 atomic mass units. This atomic mass represents the1. total mass of all the protons and neutrons in an atom of Ti3. weighted average mass of the most abundant isotope of Ti2. total mass of all the protons, neutrons, and electrons in an atom of Ti 4. weighted average mass of all the naturally occurring isotopes of Tihttp://barronsregents.com/exams/exam maint.print custom4/12
4/22/2016Barron's Regents Exam Prep39. The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms1. absorb energy3. emit energy2. absorb positrons4. emit positrons40. Compared to an atom of hydrogen in the ground state, an atom of hydrogen in the excited state has1. absorbed energy, only3. neither released nor absorbed energy2. released energy, only4. both released and absorbed energy41. Which quantity can vary among atoms of the same element?1. mass number3. number of protons2. atomic number4. number of electrons42. The atomic masses and the natural abundances of the two naturally occurring isotopes of lithium are shown on the accompanying table.Which numerical setup can be used to determine the atomic mass of lithium?1. (0.075)(6.02 u) (0.925)(7.02 u)3. (7.5)(6.02 u) (92.5)(7.02 u)2. (0.925)(6.02 u) (0.075)(7.02 u)4. (92.5)(6.02 u) (7.5)(7.02 u)43. Which notations represent different isotopes of the element sodium?1. 32S and 34S3. Na and Na02. S2- and S6 4. 22Na and 23Na44. In which pair do the particles have approximately the same mass?1. proton and electron3. neutron and electron2. proton and neutron4. neutron and beta particle45. A student constructs a model for comparing the masses of subatomic particles. The student selects a small, metal sphere with a mass of 1 gram to representan electron. A sphere with which mass would be most appropriate to represent a proton?1. 1 g3. 1/2000 g2. 1/2 g4. 2000 g46. What is the total number of protons in an atom with the electron configuration 2-8-18-32-18-1?1. 693. 1182. 794. 19747. Which subatomic particle is negatively charged?1. electronhttp://barronsregents.com/exams/exam maint.print custom3. positron5/12
4/22/2016Barron's Regents Exam Prep2. neutron4. proton48. Which electron configuration represents an atom in an excited state?1. 2-73. 2-8-12. 2-6-24. 2-8-8-249. The gold foil experiment led to the conclusion that each atom in the foil was composed mostly of empty space because most alpha particles directed at thefoil1. passed through the foil3. were deflected by the nuclei in gold atoms2. remained trapped in the foil4. were deflected by the electrons in gold atoms50. What must occur when an electron in an atom returns from a higher energy state to a lower energy state?1. A specific amount of energy is released.3. The atom undergoes transmutation.2. A random amount of energy is released.4. The atom spontaneously decays.51. Which electron-dot structure represents a nonpolar molecule?52. Which formula represents a compound that is formed primarily by sharing electrons?1. KCl3. CrCl32. CaCl24. CCl453. As an atom becomes an ion, its mass number1. decreases3. remains the same2. increases54. What is the total number of electrons in a Cu ion?1. 283. 302. 294. 3655. Which statement explains why H2O has a higher boiling point than N2?1. H2O has greater molar mass than N2.3. H2O has stronger intermolecular forces than N2.2. H2O has less molar mass than N2.4. H2O has weaker intermolecular forces than N2.http://barronsregents.com/exams/exam maint.print custom6/12
4/22/2016Barron's Regents Exam Prep56. Which type of molecule is CF4?1. polar, with a symmetrical distribution of charge3. nonpolar, with a symmetrical distribution of charge2. polar, with an asymmetrical distribution of charge4. nonpolar, with an asymmetrical distribution of charge57. Which element is malleable and can conduct electricity in the solid phase?1. iodine3. sulfur2. phosphorus4. tin58. What is the total number of electrons in a S2- ion?1. 103. 162. 144. 1859. As a bond between a hydrogen atom and a sulfur atom is formed, electrons are1. shared to form an ionic bond3. transferred to form an ionic bond2. shared to form a covalent bond4. transferred to form a covalent bond60. Which type of bonding is found in all molecular substances?1. covalent bonding3. ionic bonding2. hydrogen bonding4. metallic bonding61. Based on Table S, an atom of which element has the weakest attraction for electrons in a chemical bond?1. polonium3. selenium2. sulfur4. tellurium62. Which electron-dot symbol correctly represents an atom of its given element?63. Based on Reference Table I, which change occurs when pellets of solid NaOH are added to water and stirred?1. The water temperature increases as chemical energy is converted to 3. The water temperature decreases as chemical energy is converted toheat energy.heat energy.2. The water temperature increases as heat energy is stored as chemical 4. The water temperature decreases as heat energy is stored asenergy.chemical energy.64. Note: This question may require the use of the Reference Tables for Physical Setting/Chemistry.Which process would most effectively separate two liquids with different molecular polarities?1. filtration3. distillation2. fermentation4. conductivityhttp://barronsregents.com/exams/exam maint.print custom7/12
4/22/2016Barron's Regents Exam Prep65. Note: This question may require the use of the Reference Tables for Physical Setting/Chemistry.What is the total number of joules released when a 5.00-gram sample of water changes from liquid to solid at 0oC?1. 334 J3. 2260 J2. 1670 J4. 11,300 J66. A sample of a gas is contained in a closed rigid cylinder. According to kinetic molecular theory, what occurs when the gas inside the cylinder is heated?1. The number of gas molecules increases.3. The average velocity of the gas molecules increases.2. The number of collisions between gas molecules per unit timedecreases.4. The volume of the gas decreases.67. At room temperature, the solubility of which solute in water would be most affected by a change in pressure?1. methanol3. carbon dioxide2. sugar4. sodium nitrate68. A sample of gas is held at constant pressure. Increasing the kelvin temperature of this gas sample causes the average kinetic energy of its molecules to1. decrease and the volume of the gas sample to decrease3. increase and the volume of the gas sample to decrease2. decrease and the volume of the gas sample to increase4. increase and the volume of the gas sample to increase69. When 5 grams of KCl are dissolved in 50. grams of water at 25oC, the resulting mixture can be described as1. heterogeneous and unsaturated3. homogeneous and unsaturated2. heterogeneous and supersaturated4. homogeneous and supersaturated70. Which aqueous solution of KI freezes at the lowest temperature?1. 1 mol of KI in 500. g of water3. 1 mol of KI in 1000. g of water2. 2 mol of KI in 500. g of water4. 2 mol of KI in 1000. g of water71. According to kinetic molecular theory, collisions between gas particles in a sample of an ideal gas1. increase the energy content of the gas sample3. result in a net loss of energy by the gas sample2. produce strong attractive forces between the gas particles4. transfer energy between the gas particles72. A dilute, aqueous potassium nitrate solution is best classified as a1. homogeneous compound3. heterogeneous compound2. homogeneous mixture4. heterogeneous mixture73. Two solid samples each contain sulfur, oxygen, and sodium, only. These samples have the same color, melting point, density, and reaction with an aqueousbarium chloride solution. It can be concluded that the two samples are the same1. compound3. mixture2. element4. solution74. Which sample at STP has the same number of molecules as 5 liters of NO2(g) at STP?1. 5 grams of H2(g)http://barronsregents.com/exams/exam maint.print custom3. 5 moles of O2(g)8/12
4/22/2016Barron's Regents Exam Prep2. 5 liters of CH4(g)4. 5 x 1023 molecules of CO2(g)75. A 1.0-gram sample of which element will uniformly fill a closed 2.0-liter container at STP?1. antimony3. tellurium2. sulfur4. xenon76. Under which conditions of temperature and pressure would a real gas behave most like an ideal gas?1. 200. K and 50.0 kPa3. 600. K and 50.0 kPa2. 200. K and 200.0 kPa4. 600. K and 200.0 kPa77. Which term is defined as a measure of the average kinetic energy of the particles in a sample?1. temperature3. thermal energy2. pressure4. chemical energy78. At standard pressure, which element has a freezing point below standard temperature?1. In3. Hf2. Ir4. Hg79. Which two particle diagrams represent mixtures of diatomic elements?1. A and B3. B and C2. A and C4. B and D80. Which sample of matter can be separated into different substances by physical means?1. LiCl(aq)3. NH3(g)2. LiCl(s)4. NH3(l)81. At STP, 1.0 liter of helium contains the same total number of atoms as1. 1.0 L of Ne3. 0.5 L of Rn2. 2.0 L of Kr4. 1.5 L of Ar82. Which compound has the strongest hydrogen bonding between its molecules?1. HBr3. HF2. HCl4. HI83. Which property of an unsaturated solution of sodium chloride in water remains the same when more water is added to the solution?http://barronsregents.com/exams/exam maint.print custom9/12
4/22/2016Barron's Regents Exam Prep1. density of the solution3. mass of sodium chloride in the solution2. boiling point of the solution4. percent by mass of water in the solution84. Which ion combines with Ba2 to form a compound that is most soluble in water?1. S2-3. CO32-2. OH-4. SO42-85. Which grouping of the three phases of bromine is listed in order from left to right for increasing distance between bromine molecules?1. gas, liquid, solid3. solid, gas, liquid2. liquid, solid, gas4. solid, liquid, gas86. Which sample of water has the lowest vapor pressure?1. 100 mL at 50oC3. 300 mL at 40oC2. 200 mL at 30oC4. 400 mL at 20oC87. A sealed flask containing 1.0 mole of H2(g) and a sealed flask containing 2.0 moles of He(g) are at the same temperature. The two gases must have equal1. masses3. average kinetic energies2. volumes4. numbers of molecules88. Two basic properties of the gas phase are1. a definite shape and a definite volume3. no definite shape but a definite volume2. a definite shape but no definite volume4. no definite shape and no definite volume89. The temperature at which the solid and liquid phases of matter exist in equilibrium is called its1. melting point3. heat of fusion2. boiling point4. heat of vaporization90. In aqueous solution, a chloride ion is attracted to which end of the water molecule?1. the hydrogen end, which is the positive pole3. the oxygen end, which is the positive pole2. the hydrogen end, which is the negative pole4. the oxygen end, which is the negative pole91. According to Reference Table G, how many grams of KNO3 would be needed to saturate 200 grams of water at 70oC?1. 43 g3. 134 g2. 86 g4. 268 g92. According to Reference Table G, which of these substances is most soluble at 60oC?1. NaCl3. KClO32. KCl4. NH4Cl93. In which material are the particles arranged in a regular geometric pattern?http://barronsregents.com/exams/exam maint.print custom10/12
4/22/2016Barron's Regents Exam Prep1. CO2(g)3. H2O(l)2. NaCl(aq)4. C12H22O11(s)94. Which change is exothermic?1. freezing of water3. vaporization of ethanol2. melting of iron4. sublimation of iodine95. Which type of change must occur to form a compound?1. chemical3. nuclear2. physical4. phase96. Which statement correctly describes an endothermic chemical reaction?97. The solubility of KClO3(s) in water increases as the1. temperature of the solution increases3. pressure on the solution increases2. temperature of the solution decreases4. pressure on the solution decreases98. In which process does a solid change directly into a vapor?1. condensation3. deposition2. sublimation4. solidification99. Which molecule contains a nonpolar covalent bond?100. Given the simple representations for atoms of two elements in the accompanying diagram:Which particle diagram represents molecules of only one compound in the gaseous phase?http://barronsregents.com/exams/exam maint.print custom11/12
4/22/2016Barron's Regents Exam Prep101. Which ion, when combined with chloride ions, Cl-, forms an insoluble substance in water?1. Fe2 3. Pb2 2. Mg2 4. Zn2 http://barronsregents.com/exams/exam maint.print custom12/12
Apr 24, 2016 · 4/22/2016 Barron's Regents Exam Prep 4? 4/22/201
