p. 1

review-2 multiple choice identify the choice that best completes the statement or answers the question 1 what is another name for the representative elements a group a elements c group c elements b group b elements d transition elements 2 what is another name for the transition metals a noble gases c group b elements b group a elements d group c elements 3 which of the following elements is in the same period as phosphorus a carbon c nitrogen b magnesium d oxygen 4 each period in the periodic table corresponds to a a principal energy level c an orbital b an energy sublevel d a suborbital 5 the modern periodic table is arranged in order of increasing atomic a mass c number b charge d radius 6 to what category of elements does an element belong if it is a poor conductor of electricity a transition elements c nonmetals b metalloids d metals 7 the atomic number of an element is the total number of which particles in the nucleus a neutrons c electrons b protons d protons and electrons 8 what element has the electron configuration 1s 2s 2p 3s 3p a nitrogen c silicon b selenium d silver 9 which subatomic particle plays the greatest part in determining the properties of an element a proton c neutron b electron d none of the above 10 what are the group 1a and group 7a elements examples of a representative elements c noble gases b transition elements d nonmetallic elements 11 atomic size generally a increases as you move from left to right across a period b decreases as you move from top to bottom within a group c remains constant within a period d decreases as you move from left to right across a period 12 which of the following elements has the smallest atomic radius a sulfur c selenium

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p. 2

b chlorine d bromine 13 what is the charge of a cation a a positive charge b no charge c a negative charge d the charge depends on the size of the nucleus 14 which of the following statements is true about ions a cations form when an atom gains electrons b cations form when an atom loses electrons c anions form when an atom gains protons d anions form when an atom loses protons 15 which of the following elements has the smallest first ionization energy a sodium c potassium b calcium d magnesium 16 how many valence electrons are in an atom of phosphorus a 2 c 4 b 3 d 5 17 how many valence electrons are in an atom of magnesium a 2 c 4 b 3 d 5 18 how many valence electrons does a helium atom have a 2 c 4 b 3 d 5 19 what is the electron configuration of the calcium ion a 1s 2s 2p 3s 3p c 1s 2s 2p 3s 3p 4s b 1s 2s 2p 3s 3p 4s d 1s 2s 2p 3s 20 what is the charge on the strontium ion a 2­ b 1­ c 1 d 2 21 how many electrons does barium have to give up to achieve a noble-gas electron configuration a 1 c 3 b 2 d 4 22 what is the formula of the ion formed when potassium achieves noble-gas electron configuration a k c k b k d k 23 the electron configuration of a fluoride ion f is a 1s 2s 2p c 1s 2s 2p 3s b the same as that of a neon atom d the same as that of a potassium ion 24 what is the electron configuration of the oxide ion o a 1s 2s 2p c 1s 2s

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b 1s 2s 2p d 1s 2s 2p 25 what is the net charge of the ionic compound calcium fluoride a 2­ c 0 b 1­ d 1 26 a compound held together by ionic bonds is called a a diatomic molecule c covalent molecule b polar compound d salt 27 how many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride a 0 c 2 b 1 d 3 28 what is the formula unit of aluminum oxide a alo b al o 29 what is the formula for sodium sulfate a naso b na so c alo d al o c naso d na so 30 which of the following compounds has the formula kno a potassium nitrate c potassium nitrite b potassium nitride d potassium nitrogen oxide 31 ionic compounds are normally in which physical state at room temperature a solid c gas b liquid d plasma 32 under what conditions can potassium bromide conduct electricity a only when melted b only when dissolved c only when it is in crystal form d only when melted or dissolved in water 33 what characteristic of metals makes them good electrical conductors a they have mobile valence electrons b they have mobile protons c they have mobile cations d their crystal structures can be rearranged easily 34 an ionic bond is a bond between a a cation and an anion b valence electrons and cations c the ions of two different metals d the ions of two different nonmetals 35 which is a typical characteristic of an ionic compound a electron pairs are shared among atoms b the ionic compound has a low solubility in water c the ionic compound is described as a molecule d the ionic compound has a high melting point.

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36 what is shown by the structural formula of a molecule or polyatomic ion a the arrangement of bonded atoms c the number of metallic bonds b the number of ionic bonds d the shapes of molecular orbitals 37 which of these elements does not exist as a diatomic molecule a ne c h b f d i 38 why do atoms share electrons in covalent bonds a to become ions and attract each other b to attain a noble-gas electron configuration c to become more polar d to increase their atomic numbers 39 which of the following diatomic molecules is joined by a double covalent bond a c b d 40 according to vsepr theory molecules adjust their shapes to keep which of the following as far apart as possible a pairs of valence electrons c mobile electrons b inner shell electrons d the electrons closest to the nuclei 41 the shape of the methane molecule is called a tetrahedral c four-cornered b square d planar 42 what causes water molecules to have a bent shape according to vsepr theory a repulsive forces between unshared pairs of electrons b interaction between the fixed orbitals of the unshared pairs of oxygen c ionic attraction and repulsion d the unusual location of the free electrons 43 which of the following theories provides information concerning both molecular shape and molecular bonding a molecular orbital theory c orbital hybridization theory b vsepr theory d bohr atomic theory 44 which of the following covalent bonds is the most polar a h f c h h b h c d h n 45 what type of ions have names ending in -ide a only cations c only metal ions b only anions d only gaseous ions 46 when group 2a elements form ions they a lose two protons c lose two electrons b gain two protons d gain two electrons 47 which of the following is true about the composition of ionic compounds a they are composed of anions and cations b they are composed of anions only.

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c they are composed of cations only d they are formed from two or more nonmetallic elements 48 which of the following formulas represents an ionic compound a cs c n o b bai d pcl 49 which of the following compounds contains the leadii ion a pbo c pb2o b pbcl4 d pb2s 50 what type of compound is cuso a monotomic ionic b polyatomic covalent c polyatomic ionic d binary molecular 51 select the correct formula for sulfur hexafluoride a s f c f s b f so d sf 52 which of the following is the correct name for n o a nitrous oxide c nitrogen dioxide b dinitrogen pentoxide d nitrate oxide 53 how many hydrogen atoms are in 5 molecules of isopropyl alcohol c h o a 5 6.02 10 c 35 b 5 d 35 6.02 10 54 which of the following elements exists as a diatomic molecule a neon c nitrogen b lithium d sulfur 55 avogadro s number of representative particles is equal to one a kilogram c kelvin b gram d mole 56 how many moles of tungsten atoms are in 4.8 10 atoms of tungsten a 8.0 10 moles c 1.3 10 moles b 8.0 10 moles d 1.3 10 moles 57 how many moles of silver atoms are in 1.8 a 3.0 10 b 3.3 10 10 atoms of silver c 3.0 10 d 1.1 10 10 10 58 how many atoms are in 0.075 mol of titanium a 1.2 10-25 c 6.4 b 2.2 10 d 4.5 59 how many molecules are in 2.10 mol co a 2.53 10 molecules b 3.79 10 molecules c 3.49 d 1.26 10 10 molecules molecules

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p. 6

60 how many atoms are in 3.5 moles of arsenic atoms a 5.8 10 c 2.1 atoms b 7.5 10 atoms d 1.7 10 10 atoms atoms 61 what is true about the molar mass of chlorine gas a the molar mass is 35.5 g b the molar mass is 71.0 g c the molar mass is equal to the mass of one mole of chlorine atoms d none of the above 62 the mass of a mole of nacl is the a molar mass b atomic mass 63 what is the molar mass of aucl3 a 96 g b 130 g c molecular mass d gram atomic mass c 232.5 g d 303.6 g 64 what is the mass in grams of 5.90 mol c h a 0.0512 g c 389 g b 19.4 g d 673 g 65 how many moles of cabr are in 5.0 grams of cabr a 2.5 10 mol c 4.0 b 4.2 10 mol d 1.0 66 what is the mass of silver in 3.4 g agno a 0.025 g b 0.64 g c 2.2 g d 3.0 g 10 mol 10 mol 67 what is the mass of oxygen in 250 g of sulfuric acid h so a 0.65 g c 16 g b 3.9 g d 160 g 68 the molar volume of a gas at stp occupies a 22.4 l c 1 kilopascal b 0 c d 12 grams 69 what is the number of moles in 500 l of he gas at stp a 0.05 mol c 22 mol b 0.2 mol d 90 mol 70 what is the number of moles in 9.63 l of h s gas at stp a 0.104 mol c 3.54 mol b 0.430 mol d 14.7 mol 71 what is the percent composition of chromium in bacro a 4.87 c 20.5 b 9.47 d 25.2%

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p. 7

72 if 20.0 grams of ca combines completely with 16.0 grams of s to form a compound what is the percent composition of ca in the compound a 1.25 c 44.4 b 20.0 d 55.6 73 this symbol indicates that a heat must be applied b an incomplete combustion reaction has occurred c a gas is formed by the reaction d the reaction is reversible 74 a catalyst is a the product of a combustion reaction b not used up in a reaction c one of the reactants in single-replacement reactions d a solid product of a reaction 75 when the following equation is balanced what is the coefficient for hcl mgs hclaq mgcl aq h g a 6 c 1 b 3 d 2 76 which of the following is a balanced equation representing the decomposition of leadiv oxide a pbo c pb o pb 2o 2pb o b pbo d pbo pb o pb o 77 in the reaction 2cog o g 2co g what is the ratio of moles of oxygen used to moles of co produced a 1:1 c 1:2 b 2:1 d 2:2 78 how many moles of aluminum are needed to react completely with 1.2 mol of feo 2als 3feos 3fes al o s a 1.2 mol c 1.6 mol b 0.8 mol d 2.4 mol 79 aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas how many grams of aluminum sulfate would be formed if 250 g h so completely reacted with aluminum a 0.85 g b 290 g c 450 g d 870 g reacts completely to form h po 80 how many moles of h po are produced when 71.0 gpoa 0.063 5 mol b 1.00 mol c 4.00 mol d 16.0 mol 81 how many grams of h po are produced when 10.0 moles of water react with an excess of p o a 1.22 g b 6.7 g c 147 g d 653 g

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p. 8

82 how many liters of nh are needed to react completely with 30.0 l of no at stp 4nh g 6nog 5n g 6h og a 5.0 l c 7.5 l b 20.0 l d 120.0 l 83 calcium oxide or lime is produced by the thermal decomposition of limestone in the reaction caco s caos co g what mass of lime can be produced from 1.5 a 8.4 10 kg c 8.4 kg b 8.4 10 kg d none of the above 10 kg of limestone 84 when an equation is used to calculate the amount of product that will form during a reaction then the value obtained is called the a actual yield c theoretical yield b percent yield d minimum yield 85 what instrument is normally used to measure atmospheric pressure a thermometer c vacuum b barometer d manometer 86 what happens to the temperature of a liquid as it evaporates a it increases c it does not change b it decreases d the change cannot be determined 87 compared to the melting points of ionic compounds the melting points of molecular solids tend to be a similar c lower b unpredictable d higher 88 the volume of a gas is doubled while the temperature is held constant how does the gas pressure change a it is reduced by one half b it does not change c it is doubled d it varies depending on the type of gas 89 boyle s law states that a the volume of a gas varies inversely with pressure b the volume of a gas varies directly with pressure c the temperature of a gas varies inversely with pressure d the temperature of a gas varies directly with pressure 90 which element increases its oxidation number in the following reaction 2na 2h o 2naoh h a sodium b hydrogen c oxygen d no element increases its oxidation number 91 what is the percent composition of carbon in heptane c h a 12 c 68 b 19 d 84 92 what is the empirical formula of a substance that is 53.5 c 15.5 h and 31.1 n by weight?

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p. 9

a c hn b chnc chnd ch n 93 what is the best description for a solution with a hydroxide-ion concentration of 1 10 m a acidic c neutral b basic d the answer cannot be determined 94 an ideal gas cannot be a condensed b cooled c heated d compressed 95 under what conditions of temperature and pressure is the behavior of real gases most like that of ideal gases a low temperature and low pressure c high temperature and low pressure b low temperature and high pressure d high temperature and high pressure 96 if the atmospheric pressure on mt everest is one-third the atmospheric pressure at sea level the partial pressure of oxygen on everest is a one-sixth its pressure at sea level c one-half its pressure at sea level b one-third its pressure at sea level d equal to its pressure at sea level 97 what happens to the partial pressure of oxygen in a sample of air if the temperature is increased a it increases c it decreases b it stays the same d the change cannot be determined 98 activation energy is a the heat released in a reaction b an energy barrier between reactants and products c the energy given off when reactants collide d generally very high for a reaction that takes place rapidly 99 why does a higher temperature cause a reaction to go faster a there are more collisions per second only b collisions occur with greater energy only c there are more collisions per second and the collisions are of greater energy d there are more collisions per second or the collisions are of greater energy 100 why does a higher concentration make a reaction faster a there are more collisions per second only b collisions occur with greater energy only c there are more collisions per second and the collisions are of greater energy d there are more collisions per second or the collisions are of greater energy 101 why does a catalyst cause a reaction to proceed faster a there are more collisions per second only b the collisions occur with greater energy only c the activation energy is lowered only d there are more collisions per second and the collisions are of greater energy 102 what happens to a catalyst in a reaction a it is unchanged b it is incorporated into the products 103 a catalyst works by c it is incorporated into the reactants d it evaporates away.

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a b c d lowering the activation energy barrier shifting the equilibrium position toward the products changing the temperature of the reactants changing the particle size of the reactants 104 the rate of a chemical reaction normally a decreases as temperature increases b is slowed down by a catalyst c increases as reactant concentration increases d decreases as reactant concentration increases 105 what happens to a reaction at equilibrium when more reactant is added to the system a the reaction makes more products c the reaction is unchanged b the reaction makes more reactants d the answer cannot be determined 106 what is the effect of adding more water to the following equilibrium reaction co h o h co a more h co is produced b co concentration increases c the equilibrium is pushed in the direction of reactants d there is no effect short answer 107 an element has an atomic number of 80 how many protons and electrons are in an atom of the element 108 about what percent of elements is classified as metals 109 what is the electron configuration of sulfur 110 how many representative particles are in 1.45 g of a molecular compound with a molar mass of 237 g 111 find the mass in grams of 3.10 10 molecules of f 112 complete and balance the following equation al cl 113 complete and balance the following equation fe so baoh 114 what is a pressure of 0.520 atm equal to in mm of hg 115 what is a pressure of 622 mm hg equal to in atm 116 the volume of a gas is 250 ml at 340.0 kpa pressure what will the volume be when the pressure is reduced to 50.0 kpa assuming the temperature remains constant?

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117 a balloon filled with helium has a volume of 30.0 l at a pressure of 100 kpa and a temperature of 15.0 c what will the volume of the balloon be if the temperature is increased to 80.0 c and the pressure remains constant 118 a gas has a volume of 590 ml at a temperature of ­55.0 c what volume will the gas occupy at 30.0 c 119 a 10-g mass of krypton occupies 15.0 l at a pressure of 210 kpa find the volume of the krypton when the pressure is increased to 790 kpa 120 a gas has a pressure of 710 kpa at 227 c what will its pressure be at 27 c if the volume does not change 121 how many moles of n are in a flask with a volume of 250 ml at a pressure of 300.0 kpa and a temperature of 300.0 k 122 a mixture of gases at a total pressure of 95 kpa contains n co and o the partial pressure of the co is 24 kpa and the partial pressure of the n is 48 kpa what is the partial pressure of the o 123 calculate the molecular formulas of the compounds having the following empirical formulas and molar masses c h 58 g/mol ch 78 g/mol and hgcl 236.1 g/mol 124 if the ph is 9 what is the concentration of hydroxide ion 125 a liter of impure water has 10 sample of water mol of hydroxide ions what is the concentration of hydronium ions in this 126 if the hydroxide-ion concentration is 1 127 if the hydrogen-ion concentration is 1 10 10 m what is the ph of the solution m what is the poh of the solution 128 what is the equilibrium constant for the following reaction 3a 2b 2c 129 calculate the value of k for the following reaction at equilibrium 2nclog 2nog cl g an analysis of the equilibrium mixture in a 1-l flask gives the following results nclo 1.6 mol no 6.4 mol cl 0.49 mol numeric response 130 how many valence electrons are in bromine 131 what is the charge of a particle having 9 protons and 10 electrons 132 how many valence electrons does an iodine atom have 133 how many unshared pairs of electrons does the nitrogen atom in ammonia possess?

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134 write the charge of an chloride ion 135 what is the charge on the polyatomic ions nitrite and chlorite 136 what is the charge on the cation in cuso ?

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p. 13

review-2 answer section multiple choice 1 ans obj 2 ans obj 3 ans obj 4 ans obj 5 ans obj 6 ans obj 7 ans obj 8 ans obj 9 ans obj 10 ans obj 11 ans obj 12 ans obj 13 ans obj 14 ans obj 15 ans obj 16 ans obj 17 ans obj 18 ans obj 19 ans obj 20 ans obj 21 ans obj a 6.1.1 c 6.1.1 b 6.1.1 a 6.1.1 c 6.1.1 c 6.1.3 a 6.2.1 c 6.2.2 b 6.2.2 a 6.2.3 d 6.3.1 b 6.3.1 a 6.3.2 b 6.3.2 c 6.3.3 d 7.1.1 a 7.1.1 a 7.1.1 a 7.1.1 d 7.1.2 b 7.1.3 pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d11 1 st2.d11 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d11 1 st2.d11 dif l1 dif l1 dif l1 dif l2 dif l2 dif l3 dif l2 dif l2 dif l2 dif l2 dif l2 dif l3 dif l1 dif l2 dif l2 dif l1 dif l1 dif l1 dif l2 dif l1 dif l1 ref p 164 ref p 166 ref p 162 p 163 ref p 157 ref p 157 ref p 160 ref p 157 ref p 164 ref p 164 ref p 164 ref p 171 ref p 171 p 175 ref p 172 ref p 172 ref p 173 ref p 187 ref p 188 ref p 188 ref p 188 p 189 ref p 190 ref p 190

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p. 14

22 ans obj 23 ans obj 24 ans obj 25 ans obj 26 ans obj 27 ans obj 28 ans obj 29 ans obj 30 ans obj 31 ans obj 32 ans obj 33 ans obj 34 ans obj 35 ans obj 36 ans obj 37 ans obj 38 ans obj 39 ans obj 40 ans obj 41 ans obj 42 ans obj 43 ans obj 44 ans obj 45 ans obj 46 ans b 7.1.3 b 7.1.4 b 7.1.4 c 7.2.1 d 7.2.1 a 7.2.1 d 7.2.1 b 7.2.1 a 7.2.1 a 7.2.2 d 7.2.2 a 7.3.1 a 7.2.1 7.3.1 d 8.1.1 a 8.1.2 a 8.2.1 b 8.2.1 a 8.2.3 a 8.3.2 a 8.3.2 a 8.3.2 c 8.3.3 a 8.4.1 b 9.1.1 c pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d10 1 dif st2.d10 st2.d11 1 dif st1.d1 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif st2.d11 1 dif l1 l1 l2 l1 l1 l2 l2 l2 l2 l1 l1 l1 l1 l2 l1 l1 l2 l2 l1 l1 l2 l1 l3 l1 l1 ref p 190 ref p 192 ref p 192 ref p 194 ref p 194 ref p 194 ref p 195 ref p 192 p 195 ref p 192 p 194 ref p 196 ref p 198 ref p 201 ref p 201 ref p 244 ref p 215 ref p 217 ref p 217 ref p 221 ref p 232 ref p 232 ref p 233 ref p 234 ref p 238 p 239 ref p 254 ref p 254

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obj 47 ans obj 48 ans obj 49 ans obj 50 ans obj 51 ans obj 52 ans obj 53 ans obj 54 ans obj 55 ans obj 56 ans obj 57 ans obj 58 ans obj 59 ans obj 60 ans obj 61 ans obj 62 ans obj 63 ans obj 64 ans obj 65 ans obj 66 ans obj 67 ans obj 68 ans obj 69 ans obj 70 ans obj 9.1.1 a 9.2.1 b 9.2.1 a 9.2.1 c 9.2.2 d 9.3.2 9.5.2 b 9.3.2 9.5.3 c 10.1.2 c 10.1.2 d 10.1.2 b 10.1.2 a 10.1.2 d 10.1.2 d 10.1.2 c 10.1.2 b 10.1.3 a 10.1.4 d 10.1.4 d 10.2.1 a 10.2.1 c 10.2.1 d 10.2.1 a 10.2.2 c 10.2.2 b 10.2.2 sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta pts sta st2.d11 1 st2.d11 1 st2.d11 1 st2.d11 1 st2.d11 1 st2.d11 1 st2.d11 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st2.d10 1 st1.d1 1 st1.d1 1 st1.d1 dif l2 dif l2 dif l2 dif l2 dif l2 dif l2 dif l1 dif l1 dif l1 dif l2 dif l2 dif l2 dif l2 dif l2 dif l2 dif l1 dif l2 dif l2 dif l2 dif l2 dif l2 dif l1 dif l2 dif l2 ref p 261 ref p 262 ref p 262 p 263 ref p 264 p 277 ref p 270 p 278 ref p 269 p 277 ref p 291 p 292 ref p 290 ref p 290 ref p 290 p 291 ref p 290 p 291 ref p 291 p 292 ref p 291 p 292 ref p 291 p 292 ref p 294 ref p 295 ref p 295 p 296 ref p 297 p 298 ref p 299 ref p 298 ref p 298 ref p 300 ref p 301 ref p 301

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