Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is an ionic compound? 1) A) NO2 B) CF4 C) PCl3 D) SeBr2 E) LiCl 2) Which of the following is an ionic compound? 2) A) CH2O B) Cl2O C) PF5 D) Mg3(PO4)2 E) SCl2 3) Which of the following contains BOTH ionic and covalent bonds? 3) A) CaI2 B) CaSO4 C) COS D) SF6 E) None of the above contain both ionic and covalent bonds. 4) Which of the following is a molecular compound? 4) A) RbBr B) N2O4 C) NaNO3 D) SrSO3 E) CuCl2 5) Which of the following is a molecular compound? 5) A) P4O10 B) ZnS C) NaCN D) SrI2 E) LiOH 6) A covalent bond is best described as: 6) A) a bond between a metal and a polyatomic ion. B) a bond between a metal and a nonmetal. C) a bond between two polyatomic ions. D) the transfer of electrons. E) the sharing of electrons between atoms. 7) An ionic bond is best described as: 7) A) the attraction that holds the atoms together in a polyatomic ion. B) the transfer of electrons from one atom to another. C) the attraction between 2 nonmetal atoms. D) the attraction between 2 metal atoms. E) the sharing of electrons. 8) Which of the following is a molecular element? 8) A)S B)Ag C)Kr D)Mg E)Ti 9) Which of the following is a molecular element? 9) A) Xe B) I C) Li D) Mg E) Ar 1 10) Which of the following is an atomic element? 10) A) Mg B) Br C) O D) H E) N 11) What is the empirical formula for C4H10O2? 11) A) C2H4O B) CHO C) CHO2 D) CH2OE)C2H5O 12) What is the empirical formula for Hg2(NO3)2? 12) A) Hg2NO3 B) Hg(NO3)2 C) Hg4(NO3)4 D) HgNO3 E) Hg2(NO3)2 13) Write the formula for the compound formed between potassium and sulfur. 13) A) KS2 B) K2SC)KSD)K2SO3 E) K3S2 14) Write the formula for barium nitrite. 14) A) Ba3N2 B) Ba(NO2)2 C) B(NO2)3 D) BaNO3 E) BN 15) Write the formula for copper (II) sulfate pentahydrate. 15) A) CuS*5H2O B) CuSO4·5H2O C) (CuSO4)5 D) Cu2S*H2O E) Cu2SO3·H5 16) Write the formula for strontium nitride. 16) A) Sr3N2 B) Sr(NO3)2 C) Sr(NO2)2 D) Sr2N3 E) SrN 17) Determine the name for TiCO3. Remember that titanium forms several ions. 17) A) titanium carbonite B) titanium (II) carbonate C) titanium (II) carbonite D) titanium carbide E) titanium (I) carbonate 18) Write the name for Sn(SO4)2. Remember that Sn forms several ions. 18) A) tin (IV) sulfate B) tin (II) sulfite C) tin sulfide D) tin (I) sulfate E) tin (I) sulfite 2 19) Write the name for Ca3(PO4)2. 19) A) calcium (III) phosphite B) calcium phosphate C) tricalcium phosphorustetraoxide D) calcium phosphite E) calcium (II) phosphite 20) Determine the name for CoCl2·6H2O. Remember that Co forms several ions. 20) A) cobalt (I) chloride B) cobalt (II) chloride heptahydrate C) cobalt (I) chloride heptahydrate D) cobalt chloride hydrate E) cobalt (II) chloride hexahydrate 21) Determine the name for P4O10. 21) A) phophorus oxide B) diphosphorus pentaoxide C) phosphorus (IV) oxide D) phosphorus (II) oxide E) tetraphophorus decaoxide 22) Determine the name for N2O5. 22) A) nitrogen tetraoxide B) dinitrogen pentaoxide C) nitrogen (IV) oxide D) nitrogen oxide E) nitrogen (II) oxide 23) Determine the name for Cl2O. 23) A) chlorine oxide B) dichloro monoxide C) chlorate D) chlorine (II) oxide E) chlorine (I) oxide 24) Determine the name for H2CO3. 24) A) hydrocarbonic acid B) hydrocarbide acid C) carbonic acid D) dihydrogen carbonate E) carbonous acid 25) Determine the name for HClO3. 25) A) chlorate acid B) perchloric acid C) hydrochlorus acid D) chloric acid E) hydrochloric acid 3 26) Determine the name for aqueous HBr. 26) A) hydrobromic acid B) bromous acid C) hydrobromous acid D) bromic acid E) hydrogen bromate 27) Which of the following is one possible form of pentane? 27) A) CH3CH2CH2CH2CH2CH3 B) CH3CH2CH2CH2CH2NH2 C) CH3CH2CH2CH2CH3 D) CH3CH=CHCH2CH3 E) CH3CH2-O-CH2CH2CH3 28) Which of the following compounds is ethanol? 28) A) C2H6 B) CH3CO2CH3 C) CH3CO2H D) C2H5OH E) CH3-O-CH3 29) Calculate the molar mass for Mg(ClO4)2. 29) A) 247.52 g/mol B) 119.52 g/mol C) 123.76 g/mol D) 223.21 g/mol E) 75.76 g/mol 30) Calculate the molar mass of Al(C2H3O2)3. 30) A) 139.99 g/mol B) 258.09 g/mol C) 86.03 g/mol D) 204.13 g/mol E) 56.00 g/mol 31) Calculate the molar mass of Ca3(PO4)2. 31) A) 87.05 g/mol B) 310.18 g/mol C) 215.21 g/mol D) 279.21 g/mol E) 246.18 g/mol 4 32) Write a balanced equation to show the reaction of sulfurous acid with lithium hydroxide to form 32) water and lithium sulfite. A) HSO3 (aq) + LiOH (aq) → H2O (l) + LiSO3 (aq) B) H2S (aq) + 2 LiOH (aq) → 2 H2O (l) + Li2S (aq) C) HSO4 (aq) + LiOH (aq) → H2O (l) + LiSO4 (aq) D) H2SO3 (aq) + 2 LiOH (aq) → 2 H2O (l) + Li2SO3 (aq) E) H2SO4 (aq) + LiOH (aq) → H2O (l) + Li2SO4 (aq) 33) Write a balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form 33) carbon monoxide gas and water vapor. A) 2 C2H6 (g) + 5 O2 (g) → 4 CO (g) + 6 H2O (g) B) 2 C2H6 (g) + 7 O2 (g) → 4 CO2 (g) + 6 H2O (g) C) C2H6 (g) + 5 O (g) → 2 CO (g) + 3 H2O (g) D) 2 CH3 (g) + 5 O (g) → 2 CO (g) + 3 H2O (g) E) C2H6 (g) + 7 O (g) → 2 CO2 (g) + 3 H2O (g) 34) Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous 34) ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate. A) Al(CO3)2 (aq) + (NH3)2PO4 (aq) → AlPO4 (s) + 2 NH3CO3 (aq) B) Al(C2H3O2)2 (aq) + (NH4)2PO4 (aq) → AlPO4 (s) + 2 NH4C2H3O3 (aq) C) Al(CO2)3 (aq) + (NH4)3PO3 (aq) → AlPO3 (s) + 3 NH4CO2 (aq) D) Al(C2H3O2)2 (aq) + (NH3)2PO4 (aq) → AlPO4 (s) + 2 NH3C2H3O3 (aq) E) Al(C2H3O2)3 (aq) + (NH4)3PO4 (aq) → AlPO4 (s) + 3 NH4C2H3O3 (aq) 35) How many N2O4 molecules are contained in 76.3 g N2O4? The molar mass of N2O4 is 92.02 35) g/mol. A) 4.59 × 1025 N2O4 molecules B) 7.26 × 1023 N2O4 molecules C) 5.54 × 1025 N2O4 molecules D) 1.38 × 1024 N2O4 molecules E) 4.99 × 1023 N2O4 molecules 36) How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 36) g/mol. A) 7.74 × 1026 C2H4 molecules B) 4.69 × 1023 C2H4 molecules C) 9.83 × 1020 C2H4 molecules D) 3.69 × 1023 C2H4 molecules E) 2.71× 1020 C2H4 molecules 37) What is the mass (in kg) of 6.89 × 1025 molecules of CO2? The molar mass of CO2 is 44.01 g/mol. 37) A) 3.85 kg B) 2.60 kg C) 5.04 kg D) 6.39 kg E) 3.03 kg 5 38) What is the mass of 9.44 × 1024 molecules of NO2? The molar mass of NO2 is 46.01 g/mol. 38) A) 341 g B) 685 g C) 294 g D) 205 g E) 721 g 39) Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass. 39) A) N2O3 B) NO3 C) N2OD)NOE)NO2 40) Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg 40) Cl. A) PCl3 B) PCl C) P3Cl D) P2Cl3 E) PCl2 41) Determine the empirical formula for a compound that contains C, H and O. It contains 52.14% C 41) and 34.73% O by mass. A) CH3OB)C2H6O C) CHO D) C4H13O2 E) CH4O3 42) Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an 42) empirical formula of C2H5O2. A) C6H15O6 B) C8H20O8 C) C3H7O3 D) C2H5O2 E) C4H10O4 43) Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an 43) empirical formula of NO2. A) N3O6 B) N2O5 C) N2O4 D) NO2 E) N2O3 44) How many atoms of oxygen are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 44) is 233.99 g/mol. A) 1.10 × 1024 O atoms B) 2.87 × 1025 O atoms C) 2.96 × 1024 O atoms D) 1.23 × 1023 O atoms E) 3.19 × 1024 O atoms 45) How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 45) 126.05 g/mol. A) 4.76 × 1020 sodium ions B) 1.52 × 1027 sodium ions C) 9.52 × 1020 sodium ions D) 2.10 × 1021 sodium ions E) 1.05 × 1021 sodium ions 46) How many moles of N2O3 contain 2.55 × 1024 oxygen atoms? 46) A) 7.87 moles N2O3 B) 4.23 moles N2O3 C) 1.41 moles N2O3 D) 2.82 moles N2O3 E) 12.7 moles N2O3 6 47) How many moles of PCl3 contain 3.68 × 1025 chlorine atoms? 47) A) 20.4 moles PCl3 B) 16.4 moles PCl3 C) 54.5 moles PCl3 D) 61.1 moles PCl3 E) 49.1 moles PCl3 48) How many moles of C3H8 contain 4.95 × 1024 hydrogen atoms? 48) A) 9.73 moles C3H8 B) 6.58 moles C3H8 C) 1.03 moles C3H8 D) 3.09 moles C3H8 E) 8.22 moles C3H8 49) How many millimoles of Ca(NO3)2 contain 4.78 × 1022 formula units of Ca(NO3)2? The molar 49) mass of Ca(NO3)2 is 164.10 g/mol.