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Spring Benchmark #2 Review
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Identify the coefficients to properly balance the following equation:
Na + AuCl NaCl + Au 3,3,1,1 3,1,3,1 1,3,1,3 1,1,3,3
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Identify the potential energy of the products.
A. 50 kJ B. 200 kJ C. 100 kJ D. 150 kJ
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2H2 + O2 2H2O If 3.25 moles of hydrogen react with oxygen, how many grams of water can be produced? A. 100 g B. 117 g C g D g
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Calculate the enthalpy change for the reaction.
A. 200 kJ B. 50 kJ C. 100 kJ D. 250 kJ
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What effect does a catalyst have on a reaction?
A. lowers the activation energy required B. decreases enthalpy C. increases enthalpy D. no change
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Write the reaction for the combustion of propane (C3H8).
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In any chemical reaction, the mass of the products is ___ the mass of the reactants.
10 Greater than Less than Equal to None of the above 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Na + AuCl NaCl + Au Identify the type of reaction shown above. A. Single replacement B. synthesis C. Double replacement D. decomposition
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Identify the melting point of the substance at 73 atm.
A K B K C K D. 0 K
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Balance the following equation: ___K + ___O2 __ K2O
10 4,1,2 4,2,1 1,1,1 2,4,1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Which gas composes the greater percentage of the atmosphere?
10 Helium Hydrogen Nitrogen Oxygen 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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The instrument used to measure temperature is the ___.
10 Balance Thermometer Barometer Graduated cylinder 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Identify the phase chage when the temperature changes from 197
Identify the phase chage when the temperature changes from K to 250 K if the pressure remains constant at 73 atm. A. freezing B. sublimation C. Deposition D. melting
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In the metric system, temperature is measured on the ___ scale.
10 Celsius Fahrenheit Cesium Francium 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Calculate the energy required to melt 45 g of ice.
Heat of fusion=334 Heat of vaporization=2260 A.101,700J B.15030J C.0.134J D.6.65J
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Regular Chem only Identify the type of particle that can be blocked by concrete or lead A. Alpha B. Beta C. Gamma
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A child notices her balloon is smaller inside her air conditioned house than outside in the sun. This is an example of ___ law. 10 Avogadro’s Boyle’s Charles’ Graham’s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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What is the normal sublimation point of the substance?
A K B K C K D. 0 K
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According to Boyle’s law, the pressure of a gas will ___ when the volume decreases.
10 Increase Decrease Remain the same 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Air consists of ___. One kind of gas A mixture of several gases
10 One kind of gas A mixture of several gases A single compound Only non-reactive gases 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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All of the following are pressure units except
10 mm Hg atm kPa K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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As the temperature increases, the motion of particles ___.
10 Increases Decreases Remains the same 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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No molecular motion occurs ___.
10 At night In the atmosphere At absolute zero At the freezing point 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Of the three states of matter, ___ is the highest energy.
10 Solid Liquid Gas 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Particles of matter in the ___ state are moving very quickly and do not form a definite pattern.
10 Solid Gaseous Atomic Nuclear 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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As the temperature in a tank of propane increases, the pressure ___.
10 Increases Decreases Remains constant Decreases, then increases 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Because of its high heat capacity, the temperature of ___ changes slower than most substances.
10 Alcohol Oil Gasoline Water 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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STP is ___. 0oC and 1 atm pressure 0oK and 1 atm pressure
10 0oC and 1 atm pressure 0oK and 1 atm pressure 25oC and 1 atm pressure 273oC and 700 mm Hg 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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The process by which a liquid is converted to a gas without boiling is
10 Precipitation Evaporation Condensation Vaporization 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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The __ the altitude, the lower the pressure.
10 Lower Higher 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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What volume will one mole of a gas occupy under STP?
10 1 L 22.4 L 273 L 293 L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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What idea can be used to explain both Boyle’s and Charles’ laws?
10 Atomic theory Kinetic molecular theory Law of conservation of matter Law of conservation of energy 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Which law explains why bread rises when baked?
10 Avogadro’s Boyle’s Charles’ Graham’s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Which law explains why soft drinks “pop” when opened?
10 Avogadro’s Boyle’s Charles’ Kelvin’s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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Any time physical or chemical changes occur, you also ___.
10 Have energy changes Gain mass Lose energy Have color changes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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In a(n) __ reaction, energy is given off.
10 Endothermic Exothermic Isothermic 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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The energy in compounds is held in the
10 Oxygen atoms Hydrogen atoms Chemical bonds between atoms Water molecules 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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The minimum energy needed to start a reactions is called the
10 Energy of formation Lattice energy Bond energy Activation energy 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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When chemicals are mixed in a test tube and the test tube becomes hotter, a __ reaction has occurred. 10 Exogenic Exothermic Endogenic Endothermic 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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A compound that speeds up a reaction without being consumed itself is a(n)
10 Additive Catalyst Raw material Resource 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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If you increase the temperature, the rate of reaction will
10 Increase Decrease Remain the same 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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In chemical equations, “aq” means
10 In a water solution A crystal A pure compound A gas 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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In a combustion reaction, the products are
10 Hydrogen Carbon dioxide and water Oxygen and water oxygen 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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The chemicals on the left side of the arrow are called
10 Molecules Reactants Products Sugar 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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