Homework answers / question archive / Chapter 3: Chemical Compounds 1)  The figure shows all but which of the following:                           A)      two elements and a compound

Chapter 3: Chemical Compounds 1)  The figure shows all but which of the following:                           A)      two elements and a compound

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Chapter 3: Chemical Compounds

1)  The figure shows all but which of the following:

           

 

            A)      two elements and a compound.            D)      three compounds.

            B)      a chemical reaction.                               E)      five molecules.

            C)      one mixture and one pure substance.             

             2.         Which of the substance(s) shown in the figure is ionic?

           

 

            A)      K₂S                                                        D)      Both Na₂SO₄ and SO₂

            B)      Na₂SO₄                                                  E)      Both K₂S and Na₂SO₄

            C)      SO₂                                                                 

        3.  Which of the substance(s) shown in the figure is molecular?

           

 

            A)      Na₃N                                                     D)      Both Na₃N and KNO₃

            B)      KNO₃                                                    E)      Both  KNO₃ and NO₂

            C)      NO₂                                                                

        4.  Which of the following combinations of elements in a compound would be molecular?

            A)      sodium and nitrogen                             D)      potassium and chlorine

            B)      calcium and oxygen                              E)      sodium and sulfur

            C)      nitrogen and oxygen                                      

 

        5.  Which of the following combinations of elements in a compound would be ionic?

            A)      barium and fluorine                               D)      hydrogen and fluorine

            B)      hydrogen and sulfur                              E)      all of these

            C)      sulfur and oxygen                                          

        6.  Which of the following combinations of elements in a compound would be ionic?

            A)      sodium and sulfur                                 D)      hydrogen and oxygen

            B)      nitrogen and sulfur                                E)      all of these

            C)      phosphorus and fluorine                                

 

        7.  Which of the following is classified as an ionic compound?

            A)  NO₂    B)  CF₄    C)  CH₃OH    D)  CaCO₃    E)  all of these

 

        8.  Which of the following is classified as a molecular compound?

            A)  OH^–    B)  N₂    C)  SO₂    D)  Mg(NO₃)₂    E)  all of these

 

        9.  Rank the boiling points of the following compounds from lowest to highest:

            CO₂, LiF, H₂O

            A)      CO₂ < H₂O < LiF                                  D)      H₂O < LiF < CO₂

            B)      CO₂ < LiF < H₂O                                  E)      H₂O < CO₂ < LiF

            C)      LiF < CO₂ < H₂O                                           

 

      10.  Rank the boiling points of the following compounds from lowest to highest:

            C₁₂H₂₂O₁₁ (sucrose), O₂, NaF

            A)      C₁₂H₂₂O₁₁ (sucrose), O₂, NaF                D)      NaF, O₂, C₁₂H₂₂O₁₁ (sucrose)

            B)      O₂, NaF, C₁₂H₂₂O₁₁ (sucrose)                E)      NaF, C₁₂H₂₂O₁₁ (sucrose), O₂

            C)      O₂, C₁₂H₂₂O₁₁ (sucrose), NaF                        

 

      11.  Rank the boiling points of the following compounds from lowest to highest:

            N₂, MgO, C₂H₅OH (ethyl alcohol)

            A)      MgO, C₂H₅OH (ethyl alcohol), N₂       D)      N₂, C₂H₅OH (ethyl alcohol), MgO

            B)      MgO, N₂, C₂H₅OH (ethyl alcohol)       E)      C₂H₅OH (ethyl alcohol), N₂, MgO

            C)      N₂, MgO, C₂H₅OH (ethyl alcohol)                

 

      12.  Which of the following is the correct formula for the bromide ion?

            A)  Br₂    B)  Br₂^–    C)  Br₂^2–    D)  Br^–    E)  BrO₃^–

 

      13.  Which of the following is the correct formula for the nitride ion?

            A)  N₂    B)  NO₂^–    C)  NO₃^–    D)  N₂^3–    E)  N₃^–

      14.  Which combination of formula and name is incorrect?

            A)      Na⁺ = sodium ion                                  D)      F^- = fluoride ion

            B)      Ca²⁺ = calcium ion                                 E)      O^2- = oxide ion

            C)      N^2- = nitride ion                                             

 

      15.  Which combination of formula and name is incorrect?

            A)      S^2- = sulfide ion                                    D)      Sr⁺ = strontium ion

            B)      Br^- = bromide ion                                 E)      P^3- = phosphide ion

            C)      Li⁺ = lithium ion                                             

 

      16.  Which combination of formula and name is incorrect?

            A)      K⁺ = potassium ion                                D)      S^2-  = sulfide ion

            B)      I^- = iodide ion                                       E)      N^3- = nitride ion

            C)      Mg⁺ = magnesium ion                                    

 

      17.  The name of the oxoanion of nitrogen with a 1^- charge shown in the figure is:

           

 

            A)  nitrooxate ion.    B)  nitride ion.    C)  nitrite ion.    D)  nitrate ion.    E)  nitrous ion.

 

      18.  The name of the oxoanion of nitrogen with a 1^- charge shown in the figure is:

           

 

            A)  nitrooxate ion.    B)  nitride ion.    C)  nitrite ion.    D)  nitrate ion.    E)  nitrous ion.

 

      19.  The name of the oxoanion of sulfur with a 2^- charge shown in the figure is:

           

 

            A)      sulfite ion.                                             D)      sulfurous ion.

            B)      sulfate ion.                                             E)      sulfoxate ion.

            C)      sulfide ion.                                                     

 

      20.  Which of the following combinations of formula and name is incorrect?

            A)      hydroxide ion = OH^-                            D)      nitrite ion = NO₂^-

            B)      nitrate ion = NO₃^-                                 E)      sulfate ion = SO₄^2-

            C)      sulfide ion = SO₃^2-                                         

 

      21.  Which of the following combinations of formula and name is incorrect?

            A)      nitride ion = NO₂^-                                 D)      perchlorate ion = ClO₄^-

            B)      cyanide ion = CN^-                                E)      chloride ion = Cl^-

            C)      chlorite ion = ClO₂^-                                       

 

      22.  Which of the following combinations of formula and name is incorrect?

            A)      carbonate ion  = CO₃^2-                          D)      periodate ion = IO₄^-

            B)      ammonium ion  = NH₃                          E)      hypochlorite ion = ClO^-

            C)      bicarbonate ion = HCO₃^-                               

 

      23.  The formula for the permanganate ion is:

            A)  MnO₄^-    B)  MnO₂^2-    C)  MnO₃^-    D)  MnO₃^2-    E)  MnO₄^2-

 

      24.  The formula for the ammonium ion is:

            A)  NH₃⁺    B)  NH₃    C)  NH₄⁺    D)  NH₄    E)  NH₄^-

 

      25.  The formula for the bicarbonate ion is:

            A)  C₂O₃^2-    B)  CO₃^2-    C)  HCO₃^2-    D)  HCO₃^-    E)  C₂O₄^2-

 

      26.  The formula for the phosphate ion is:

            A)  PO₃^2-    B)  PO₃^4-    C)  PO₃^3-    D)  PO₄^2-    E)  PO₄^3-

 

      27.  The formula for the acetate ion is:

            A)  CH₃CO₂^-    B)  CH₂CO₃^-    C)  CH₃CO₂^2-    D)  CH₃CO₂^3-    E)  CH₂CO₂^-

 

      28.  The formula for the chlorite ion is:

            A)  ClO^-    B)  ClO₂^-    C)  ClO₃^-    D)  ClO₄^-    E)  ClO₂^2-

 

      29.  The formula for the chlorate ion is ClO₃^-.  What is the formula for the perchlorate ion?

            A)  ClO₄^–    B)  ClO₂^–    C)  ClO^–    D)  ClO₃^2–    E)  PClO₃^–

      30.  The formula for the bromate ion is BrO₃^-.  What is the formula for the bromite ion?

            A)  BrO₄^–    B)  BrO₂^–    C)  BrO^–    D)  BrO₃^2–    E)  Br^-

 

      31.  Based on common charges, which formula for an ionic compound is incorrect?

            A)  CaCl    B)  NaF    C)  SrO    D)  MgS    E)  K₃P

 

      32.  Based on common charges, which formula for an ionic compound is incorrect?

            A)  Ba(NO₃)₂    B)  Ca(OH)₂    C)  MgCl₃    D)  Al₂O₃    E)  KBr

 

      33.  Based on common charges, which formula for an ionic compound is incorrect?

            A)  Li₂S    B)  CaO    C)  Na₃N    D)  K₂Cl    E)  Mg(OH)₂

 

      34.  Based on common charges, which formula for an ionic compound is incorrect?

            A)  NaClO₃    B)  Sr(NO₃)₂    C)  AlCl₃    D)  KI    E)  MgBr

 

      35.  Based on common charges, which formula for an ionic compound is incorrect?

            A)  LiCO₃    B)  NaBr    C)  CaO    D)  SrS    E)  MgCl₂

      36.  Which of the following formulas for a compound containing the Fe²⁺ ion is incorrect?

            A)  FeO    B)  FeCl    C)  FeS    D)  FeSO₄    E)  Fe(NO₃)₂

 

      37.  Which of the following formulas for a compound containing the Cu²⁺ ion is incorrect?

            A)  Cu(NO₃)₂    B)  CuS    C)  CuN    D)  CuSO₄    E)  CuCO₃

 

      38.  Which of the following formulas for a compound containing the Fe³⁺ ion is incorrect?

            A)  FeS    B)  Fe₂S₃    C)  FeN    D)  FePO₄    E)  FeBr₃

 

      39.  Which of the following formulas for a compound containing the Cu²⁺ ion is incorrect?

            A)  CuO    B)  CuP    C)  CuCO₃    D)  CuSO₄    E)  CuCl₂

 

      40.  Which of the following formulas for a compound containing the Cr³⁺ ion is incorrect?

            A)  Cr(OH)₃    B)  Cr₂(SO₄)₃    C)  CrN    D)  CrNO₃

 

      41.  Which of the following formulas for a compound containing the Cr²⁺ ion is incorrect?

            A)  CrClO₄    B)  CrSO₄    C)  CrO    D)  CrS    E)  CrCl₂

 

      42.  What is the formula for a compound composed of Cr³⁺ ions and SO₃^2- ions?

            A)  CrSO₃    B)  Cr₂(SO₃)₃    C)  Cr₃(SO₃)₂    D)  Cr(SO₃)₂    E)  Cr(SO₃)₃

      43.  What is the formula for a compound composed of Ca²⁺ ions and PO₄^3- ions?

            A)  CaPO₄    B)  Ca₂(PO₄)₃    C)  Ca₃(PO₄)₂    D)  Ca(PO₄)₂    E)  Ca(PO₄)₃

 

      44.  What is the correct formula for the compound formed between iron(III) ion and the oxide ion?

            A)  FeO    B)  Fe₂O₃    C)  Fe₃O₂    D)  Fe₃O₄    E)  FeO₃

 

      45.  What is the correct formula for the compound formed between copper(II) ion and the phosphide ion?

            A)  CuPO₄    B)  Cu₂PO₄    C)  Cu₃(PO₄)₂    D)  Cu₃P₂    E)  CuP

 

      46.  What is the correct formula for the compound formed between the aluminum ion and the sulfide ion?

            A)  Al₃S₂    B)  AlS    C)  Al₂S    D)  AlS₂    E)  Al₂S₃

 

      47.  What is the correct formula for the compound formed between the aluminum ion and the hydroxide ion?

            A)  AlOH    B)  Al(OH)₂    C)  Al(OH)₃    D)  Al₃OH    E)  AlH₃

 

      48.  What is the correct formula for the compound formed between the calcium ion and the sulfate ion?

            A)  CaSO₄    B)  Ca₂(SO₄)₂    C)  Ca(SO₄)₂    D)  CaS    E)  CaSO₃

 

      49.  What is the correct formula for the compound formed between the cobalt(III) ion and the sulfate ion?

            A)  CoSO₄    B)  Co₂(SO₄)₃    C)  Co₃(SO₄)₂    D)  Co₂S₃    E)  CoSO₃

 

      50.  What is the correct formula for the compound chromium(III) sulfide?

            A)  CrS    B)  Cr₃S    C)  CrS₃    D)  Cr₃S₂    E)  Cr₂S₃

 

      51.  What is the correct formula for the compound lead(IV) oxide?

            A)  PbO₂    B)  PbO₄    C)  Pb₂O    D)  Pb₄O    E)  PbO

 

      52.  Which of the following formula/name pairs is incorrect?

            A)      FeO  iron(II) oxide                                D)      LiOH  lithium hydroxide

            B)      K₂SO₄   potassium sulfide                     E)      MgO  magnesium oxide

            C)      MnO₄  manganese(IV) oxide                         

 

      53.  Which of the following formula/name pairs is incorrect?

            A)      BaBr₂   barium bromide                        D)      Sr(OH)₂  strontium hydroxide

            B)      CuO  copper(II) oxide                          E)      LiNO₃  lithium nitrate

            C)      MgCl₂  magnesium dichloride                       

 

      54.  Which of the following formula/name pairs is incorrect?

            A)      K₂SO₄  potassium sulfate                      D)      Fe₂O₃  iron(II) oxide

            B)      Na₃N  sodium nitride                            E)      Cu₂S  copper(I) sulfide

            C)      Li₂CO₃  lithium carbonate                              

 

      55.  Which of the following formula/name pairs is incorrect?

            A)      MnO   manganese(II) oxide                  D)      AlP  aluminum phosphide

            B)      CaO  calcium oxide                               E)      Li₂SO₃  dilithium sulfite

            C)      MgCl₂  magnesium chloride                           

 

      56.  Which of the following formula/name pairs is incorrect?

            A)      RbS  rubidium sulfide                           D)      Fe₂S₃  iron(III) sulfide

            B)      K₂CO₃  potassium carbonate                 E)      K₂O  potassium oxide

            C)      NaClO₄  sodium chloroxate                           

 

      57.  Which of the following is the correct formula for the compound with the name calcium nitride?

            A)  CaN    B)  Ca₃N₂    C)  Ca₂N₃    D)  CaN₂    E)  Ca₂N

 

      58.  Which of the following is the correct formula for the compound with the name iron(II) phosphate?

            A)  FeP    B)  Fe₃(PO₄)₂    C)  FePO₄    D)  Fe₂(PO₃)₃    E)  Fe₂(PO₄)₃

 

      59.  Which of the following is the correct formula for the compound with the name copper(II) sulfate?

            A)  Cu₂S    B)  CuS₂    C)  Cu₂SO₄    D)  CuSO₄    E)  CuSO₃

 

      60.  Which of the following is the correct formula for the compound with the name manganese(II) phosphate?

            A)  Mn₃(PO₄)₂    B)  Mn₂(PO₄)₃    C)  MnPO₄    D)  Mn₃P₂    E)  Mn₂P₃

 

      61.  Which of the following is the correct formula for the compound with the name aluminum sulfide?

            A)  AlS    B)  Al₃S₂    C)  Al₂S₃    D)  AlSO₄    E)  Al₂(SO₄)₃

 

      62.  The formula for barium carbonate is:

            A)  Ba₂CO₃    B)  BaCO₃    C)  BaCO₂    D)  BaCO

      63.  The formula for copper(I) sulfide is:

            A)  CuS    B)  CuS₂    C)  Cu₂S    D)  CuSO₄    E)  Cu₂SO₄

 

      64.  The formula for calcium nitrate is:

            A)  CaNO₃    B)  Ca₂NO₃    C)  Ca(NO₃)₂    D)  Ca(NO₃)₃    E)  Ca(NO₂)₂

 

      65.  Which of the following is the correct name for the compound CoBr₂?

            A)      cobalt bromide                                      D)      cobalt(II) bromate

            B)      cobalt(II) bromide                                 E)      cobalt(IV) bromide

            C)      cobalt dibromide                                            

 

      66.  Which of the following is the correct name for the compound Mn₂O₃?

            A)      dimanganese trioxide                            D)      manganese(II) oxide

            B)      manganate ion                                       E)      manganese oxide

            C)      manganese(III) oxide                                     

            Ans:  C

 

      67.  Which of the following is the correct name for the compound FeSO₄?

            A)      iron(II) sulfate                                       D)      iron sulfur tetroxide

            B)      iron(IV) sulfate                                     E)      iron sulfite

            C)      iron sulfate                                                     

      68.  Which of the following compound names is not correct?

            A)      calcium hydroxide                                 D)      sodium cyanide

            B)      iron(II) dichloride                                 E)      ammonium hydroxide

            C)      potassium fluoride                                         

 

      69.  Which of the following compound names is not correct?

            A)      strontium dinitrate                                 D)      potassium permanganate

            B)      sodium oxide                                         E)      silver chloride

            C)      copper(II) carbonate                                      

 

      70.  Which of the following compound names is not correct?

            A)      iron(III) sulfate                                     D)      potassium nitrate

            B)      copper(II) diphosphide                         E)      calcium sulfide

            C)      sodium hydroxide                                          

      71.  The correct formulas for the compounds in the figure are:

           

 

            A)      NF₃, P₄O₁₀, C₂H₄Cl₂                              D)      NF₄, P₃O₁₀, C₂H₂Cl₄

            B)      NF₃, P₄O₈, C₂H₄Cl₂                               E)      NF₄, P₃O₁₀, C₂H₂Cl₂

            C)      NF₃, P₄O₁₀, C₂H₂Cl₄                                      

      72.  The correct formulas for the compounds in the figure are:

           

 

            A)      Cl₃P, Cl₆S, C₃H₂F₆                                D)      P₃Cl, S₆Cl, C₃H₆F₂

            B)      PCl₃, SCl₆, C₃H₆F₂                                E)      PCl₃, SCl₈, C₃H₆F₂

            C)      PCl₃, SCl₄, C₃H₆F₃                                         

      73.  The compound ClO₃ is a dark brown solid powder that is not stable above 25°C.  Name this molecular compound.

            A)      chlorine trioxide                                    D)      chlorite

            B)      chlorine oxide                                        E)      chlorine(VI) oxide

            C)      chlorate                                                          

      74.  The compound SO₂ is a colorless gas with a boiling of –10°C.  Name this molecular compound.

            A)  sulfate    B)  sulfite    C)  sulfur(IV) oxide    D)  sulfur dioxide    E)  sulfur(II) oxide

 

      75.  The compound NO₂ is a reddish brown gas with a boiling of 21°C.  Name this molecular compound.

            A)      nitrogen (IV) oxide                               D)      nitrate

            B)      nitrogen dioxide                                    E)      nitrite

            C)      nitrogen oxide                                                

 

      76.  Which of the following formula/name combinations is incorrect?

            A)      N₂O₄  dinitrogen tetroxide                    D)      CS₂  carbon disulfide

            B)      ClO₂  dichlorine oxide                          E)      PCl₃  phosphorus trichloride

            C)      SO₃  sulfur trioxide                                        

 

      77.  Which of the following formula/name combinations is incorrect?

            A)      CS₂  carbon disulfide                            D)      PF₃  phosphorus trifluoride

            B)      SO₂  sulfur dioxide                               E)      P₄O₁₀  tetraphosphorus  decoxide

            C)      N₂O₅  dinitrogen tetroxide                             

 

      78.  Which of the following formula/name combinations is incorrect?

            A)      SF₆  sulfur hexafluoride                        D)      BN  boron nitride

            B)      NO₂  nitrogen dioxide                           E)      ICl₇ iodine hexachloride

            C)      PF₅  phosphorus pentafluoride                       

 

      79.  Which of the following formula/name combinations is incorrect?

            A)      SO₃  sulfur trioxide                               D)      SF₄ sulfur pentafluoride

            B)      NI₃  nitrogen triiodide                           E)      ClO₂  chlorine dioxide

            C)      CO carbon monoxide                                     

 

      80.  The correct formula for tetraphosphorus hexasulfide is:

            A)  PS    B)  P₅S₇    C)  P₅S₆    D)  P₄S₇    E)  P₄S₆

 

      81.  The correct formula for dinitrogen pentoxide is:

            A)  NO₅    B)  N₂O₄    C)  N₂O₅    D)  NO₆    E)  N₂O₆

 

      82.  The correct formula for tetraphosphorus hexoxide is:

            A)  PO₆    B)  P₅O₆    C)  P₄O₇    D)  P₄O₆    E)  P₅O₇

 

      83.  Which of the following formula/name combinations is incorrect?

            A)      HF(aq)  hydrofluoric acid                     D)      HClO₄(aq)  perchloric acid

            B)      HNO₃(aq)  nitrous acid                         E)      H₃PO₃(aq)  phosphorous acid

            C)      H₂SO₄(aq) sulfuric acid                                 

 

      84.  Which of the following formula/name combinations is incorrect?

            A)      HNO₂(aq)  nitrous acid                         D)      HClO₂(aq)  hypochlorous acid

            B)      HBr(aq)  hydrobromic acid                   E)      H₃PO₄(aq)  phosphoric acid

            C)      H₂SO₃(aq)  sulfurous acid                             

 

      85.  Which of the following formula/name combinations is incorrect?

            A)      HI(aq)  hydroiodic acid                        D)      H₂SO₃(aq)  sulfurous acid

            B)      H₂S(aq)  hydrosulfuric acid                  E)      H₃PO₃(aq)  phosphoric acid

            C)      HClO₃(aq)  chloric acid                                 

 

      86.  Which set of ions is formed when (NH₄)₂SO₄ dissolves in water?

            A)      (NH₄)₂²⁺ + SO₄^2-                                   D)      2 N^3- + 8 H⁺ + S⁺⁶ + 4 O^2-

            B)      2 NH₃ + 2 H⁺ + SO₄^2-                           E)      2 N^3- + 8 H⁺ + SO₄^2-

            C)      2 NH₄⁺ + SO₄^2-                                              

 

      87.  Which set of ions is formed when Ca(NO₃)₂ dissolves in water?

            A)      Ca²⁺ + (NO₃)₂^2-                                     D)      Ca²⁺ + 2 NO₃^-

            B)      Ca + (NO₃)₂                                           E)      Ca²⁺ + 2 N^3- + 6 O^2-

            C)      Ca⁺ + 2 NO₃^-                                                 

      88.  Which set of ions is formed when Cu₂SO₄ dissolves in water?

            A)      2 Cu²⁺ + SO₄^2-                                      D)      2 Cu⁺ + S⁺⁶ + 4 O^2-

            B)      Cu²⁺ + SO₄^2-                                         E)      Cu₂²⁺ + 2 SO₄^2-

            C)      2 Cu⁺ + SO₄^2-                                                

 

      89.  Which set of formulas is correct for the compounds calcium hydrogen carbonate, magnesium chloride, and calcium sulfate, which can cause scale build-up in pipes?

            A)      CaHCO₃, MgCl₂, and Ca(SO₄)₂            D)      Ca(HCO₃)₂, MgCl₂, and CaSO₄

            B)      CaHCO₃, MgCl, and Ca(SO₄)₂             E)      Ca(HCO₃)₂, MgCl₂, and Ca₂SO₄

            C)      Ca(HCO₃)₂, MgCl, and CaSO₄                      

 

      90.  Which set of formulas is correct for the compounds ammonia, nitric acid, and nitrous acid, respectively?

            A)      NH₃, HN, HNO                                    D)      NH₃, HNO₃, HNO₂

            B)      NH₄, HNO₂, HNO₃                               E)      NH₄, HNO₃, HNO₂

            C)      NH₃, HNO₂, HNO₃                                       

 

      91.  Aluminum sulfate, calcium oxide, and water react together in a process used to remove solids from treated water.  Which set of formulas is correct?

            A)      AlSO₄, Ca₂O, H₂O                                D)      Al₂(SO₄)₃, CaO₂, H₂O₂

            B)      Al₃(SO₄)₂, Ca₂O, H₂O                           E)      Al₂(SO₄)₃, CaO, H₂O

            C)      Al₂(SO₄)₃, Ca₂O, H₂O₂                                  

 

      92.  Which of the following compounds should be crystalline, brittle solids at room temperature and are electrolytes?  MgCl₂, CCl₄, N₂O₄, NaOH

            A)      MgCl₂ and CCl₄                                    D)      NaOH only

            B)      N₂O₄ only                                              E)      MgCl₂ and NaOH

            C)      N₂O₄ and NaOH                                            

 

      93.  Which of the following compounds would you expect to exist as ions when dissolved in water?  KNO₃, HBr, CH₃OH

            A)      KNO₃ only                                            D)      KNO₃ and HBr

            B)      HBr only                                               E)      HCl and CH₃OH

            C)      CH₃OH only                                                  

 

      94.  Which of the following would you expect to be nonelectrolytes when dissolved in water?  MgCl₂, CH₃OH, N₂

            A)      MgCl₂ only                                            D)      MgCl₂ and CH₃OH

            B)      CH₃OH only                                         E)      CH₃OH and N₂

            C)      N₂ only                                                           

 

      95.  Which of the following compounds would you expect to have the lowest melting point?

            A)  CaO    B)  H₂O    C)  Na₂O    D)  LiCl    E)  NaH

      96.  Which of the following best describes HCl when dissolved in water?

           

 

            A)      strong electrolyte                                   D)      exists as atoms and molecules

            B)      weak electrolyte                                    E)      Exists as molecules only

            C)      nonelectrolyte                                                

 

      97.  SO₃ and SO₃^2- have the same number of each type of atom, so they have the same name and the same chemical properties.

          

 

      98.  Water has H at the beginning of its formula, so it is considered to be an acid.

             99.       The central atom is normally listed first in the formula for a binary molecule or ion.

 

    100.  When naming binary molecular compounds, it is always unnecessary to use Greek prefixes.

 

    101.  From their position in the periodic table, we would predict that both oxygen and sulfur would have a charge of 2^- in a binary ionic compound.

    102.  In the old system of naming ionic compounds formed from metals with two different charges, the suffix –ous  is used for the higher charge, while the suffix –ic indicates the lower charge.

 

    103.  Polyatomic ions that contain oxygen attached to some other element are called oxoanions.

 

    104.  Nonelectrolytes are compounds which break apart into ions when dissolved in water.

 

    105.  A molecular compound is composed of atoms of a metal and a nonmetal.

 

    106.  Most molecular compounds remain as molecules when dissolved in water.

 

    107.  List similarities and differences for the substances shown in the figure.

           

 

    108.  In your own words, briefly explain the difference between dissolving and melting.

 

    109.  Zinc, cadmium, and silver compounds do not use Roman numerals in their names.  Why is this?

    110.  Suppose you need iron(II) phosphate for an experiment.  If you find bottles labeled Fe₃(PO₄)₂, Fe₂(PO₄)₃, Fe₃P₂, and FeP, which would you use, or would it make no difference?

    111.  Methane's formula is CH₄, but it is not an acid.  CH₃CO₂H is acetic acid.  Given the figure, label the hydrogen that is responsible for the acidic properties of acetic acid, and tell why you selected the one you did.

           

 

    112.  Describe and draw what happens on a molecular level when HCl(g) is dissolved in water.

 

    113.  Describe and draw on a molecular level what happens when an ionic compound, such as sodium chloride, is dissolved in water.

 

    114.  Compare and contrast the properties of ionic compounds versus molecular compounds.

    115.  If you were told that the formula for the iodate ion is IO₃^-, what would the formula be for an iodite ion, and how would you predict the formula?

 

    116.  The images in the figure represent aqueous solutions of the compounds BaCl₂, Na₂S and KBr.  Match the images to the formulas, and give the reason for your selections.