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Physical Setting / Chemistry - New York Regents January 2015

   Directions (1–30): For each statement or question, record on your separate answer sheet the number of the
word or expression that, of those given, best completes the statement or answers the question. Some questions
may require the use of the 2011 Edition Reference Tables for Physical Setting/Chemistry.

Formats Worksheet / Test Paper Quiz Review
: Multiple choice

Your Performance  

1.

1 According to the modern model of the atom, the
  nucleus of an atom is surrounded by one or more
  (1) electrons             (3) positrons
  (2) neutrons              (4) protons

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  Half-n-half Clue
 

2.

2 Which particle has a mass of approximately
  1 atomic mass unit?
  (1) an alpha particle (3) an electron
  (2) a beta particle   (4) a neutron

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3.

3 A specific amount of energy is emitted when
  excited electrons in an atom in a sample of an
  element return to the ground state. This emitted
  energy can be used to determine the
  (1) mass of the sample
  (2) volume of the sample
  (3) identity of the element
  (4) number of moles of the element

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4.

4 According to the wave-mechanical model, an
  orbital is defined as the
  (1) circular path for electrons
  (2) circular path for neutrons
  (3) most probable location of electrons
  (4) most probable location of neutrons

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5.

5 All phosphorus atoms have the same
  (1) atomic number
  (2) mass number
  (3) number of neutrons plus the number of
      electrons
  (4) number of neutrons plus the number of
      protons

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6.

6 At STP, which element is a good conductor of
  electricity?
  (1) chlorine           (3) silver
  (2) iodine             (4) sulfur

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7.

7 Which phrase describes the molecular structure
  and properties of two solid forms of carbon,
  diamond and graphite?
  (1) the same molecular structures and the same
      properties
  (2) the same molecular structures and different
      properties
  (3) different molecular structures and the same
      properties
  (4) different molecular structures and different
      properties

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8.

8 Which quantity is equal to one mole of Au?
  (1) the atomic mass in grams
  (2) the atomic number in grams
  (3) the mass of neutrons in grams
  (4) the number of neutrons in grams

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9.

9 Given the balanced equation representing the
  reaction between methane and oxygen:
          CH4 + 2O2 → CO2 + 2H2O
  According to this equation, what is the mole
  ratio of oxygen to methane?

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10.

10 Which list includes three    types of chemical
   reactions?
   (1) decomposition, single    replacement, and
       solidification
   (2) decomposition, single    replacement, and
       double replacement
   (3) solidification, double   replacement, and
       decomposition
   (4) solidification, double   replacement, and
       single replacement

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11.

11 Which compound has the greatest percent
   composition by mass of sulfur?
   (1) BaS                 (3) MgS
   (2) CaS                 (4) SrS

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12.

12 Two molecules of HBr collide and then form H2
   and Br2. During the collision, the bonds in the
   HBr molecules are
   (1) broken as energy is absorbed
   (2) broken as energy is released
   (3) formed as energy is absorbed
   (4) formed as energy is released

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13.

13 Which atom in the ground state has a stable
   electron configuration?
   (1) carbon              (3) neon
   (2) magnesium           (4) oxygen

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14.

14 Which statement describes a multiple covalent
   bond?
   (1) Two electrons are shared.
   (2) Four electrons are shared.
   (3) Two electrons are transferred.
   (4) Four electrons are transferred.

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15.

15 The electronegativity difference between the
   atoms in a molecule of HCl can be used to
   determine
   (1) the entropy of the atoms
   (2) the atomic number of the atoms
   (3) the first ionization energy of the atoms
   (4) the polarity of the bond between the two
       atoms

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16.

16 Which two gases can not be broken down by
   chemical means?
   (1) CO and He         (3) Xe and He
   (2) CO and NH3        (4) Xe and NH3

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17.

17 Two substances in a mixture differ in density
   and particle size. These properties can be used to
   (1) separate the substances
   (2) chemically combine the substances
   (3) determine the freezing point of the mixture
   (4) predict the electrical conductivity of the
       mixture

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18.

18 Which unit is used to express an amount of
   thermal energy?
   (1) gram              (3) joule
   (2) mole              (4) pascal

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19.

19 Under which conditions of temperature and
   pressure does a real gas behave most like an
   ideal gas?
   (1) low temperature and low pressure
   (2) low temperature and high pressure
   (3) high temperature and low pressure
   (4) high temperature and high pressure

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20.

20 According to the kinetic molecular theory for an
   ideal gas, all gas particles
   (1) are in random, constant, straight-line motion
   (2) are separated by very small distances relative
       to their sizes
   (3) have strong intermolecular forces
   (4) have collisions that decrease the total energy
       of the system

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21.

21 Which mathematical expression represents the
   heat of reaction for a chemical reaction?
   (1) (the heat of fusion) – (the heat of vaporization)
   (2) (the heat of vaporization) – (the heat of fusion)
   (3) (the potential energy of the products) – (the
       potential energy of the reactants)
   (4) (the potential energy of the reactants) – (the
       potential energy of the products)

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22.

22 At 101.3 kPa and 298 K, a 1.0-mole sample of
   which compound absorbs the greatest amount
   of heat as the entire sample dissolves in water?
   (1) LiBr                 (3) NaOH
   (2) NaCl                 (4) NH4Cl

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23.

23 For a reaction at equilibrium, which change can
   increase the rates of the forward and reverse
   reactions?
   (1) a decrease in the concentration of the
       reactants
   (2) a decrease in the surface area of the products
   (3) an increase in the temperature of the system
   (4) an increase in the activation energy of the
       forward reaction

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24.

24 Which reaction produces ethanol?
   (1) combustion         (3) fermentation
   (2) esterification     (4) polymerization

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25.

25 The chemical process in which electrons are
   gained by an atom or an ion is called
   (1) addition             (3) reduction
   (2) oxidation            (4) substitution

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26.

26 Which process occurs in an operating voltaic cell?
   (1) Electrical energy is converted to chemical
       energy.
   (2) Chemical energy is converted to electrical
       energy.
   (3) Oxidation takes place at the cathode.
   (4) Reduction takes place at the anode.

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27.

27 What can be explained by the Arrhenius theory?
   (1) the behavior of many acids and bases
   (2) the effect of stress on a phase equilibrium
   (3) the operation of an electrochemical cell
   (4) the spontaneous decay of some nuclei

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28.

28 According to one acid-base theory, a water
   molecule acts as an acid when the molecule
   (1) donates an H+ ion
   (2) accepts an H+ ion
   (3) donates an OH- ion
   (4) accepts an OH- ion

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29.

29 Positrons and beta particles have
   (1) the same charge and the same mass
   (2) the same charge and different masses
   (3) different charges and the same mass
   (4) different charges and different masses

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30.

30 Which term identifies a type of nuclear reaction?
   (1) transmutation         (3) deposition
   (2) neutralization        (4) reduction

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