front 1 In a covalent bond A) two atoms exchange electrons and the ions are attracted to one another. B) two ions come together and form a crystal lattice. C) two atoms share valence electrons and those shared electrons form the chemical bond. D) two elements react and form a new compound. | back 1 C) two atoms share valence electrons and those shared electrons form the chemical bond. |
front 2 Which of the following is an example of a covalent bond? A) K - Cl B) Al - Cl C) H - Cl D) Al - Al | back 2 C) H - Cl |
front 3 What is the correct IUPAC name for BrCl₃? | back 3 bromine trichloride |
front 4 What is the correct IUPAC name for CBr₄? | back 4 carbon tetrabromide |
front 5 What is the correct IUPAC name for CBr₄? | back 5 carbon tetrabromide |
front 6 What is the correct IUPAC name for NI₃? | back 6 nitrogen triiodide |
front 7 What is the correct IUPAC name for N₂O₄? | back 7 dinitrogen tetroxide |
front 8 What is the correct IUPAC name for P₄S₃? | back 8 tetraphosphorus trisulfide |
front 9 What is the correct IUPAC name for SeO₂? | back 9 selenium dioxide |
front 10 What is the correct IUPAC name for S₂Cl₈? | back 10 disulfur octachloride |
front 11 What is the correct IUPAC name for TeBr₆? | back 11 tellurium hexabromide |
front 12 What is the correct IUPAC name for Se₂I₈? | back 12 diselenium octaiodide |
front 13 What is the correct IUPAC name for SO₃? | back 13 sulfur trioxide |
front 14 What is the correct IUPAC name for TeF₄? | back 14 tellurium tetrafluoride |
front 15 What is the correct IUPAC name for AsBr₃? | back 15 arsenic tribromide |
front 16 What is the correct IUPAC name for As₂S₅? | back 16 diarsenic pentasulfide |
front 17 What is the correct IUPAC name for SbCl₃? | back 17 antimony trichloride |
front 18 Write the chemical formula for arsenic pentafluoride | back 18 AsF₅ |
front 19 Write the chemical formula for bromine pentachloride | back 19 BrCl₅ |
front 20 Write the chemical formula for carbon tetrafluoride | back 20 CF₄ |
front 21 Write the chemical formula for dichlorine heptoxide | back 21 Cl₂O₇ |
front 22 Write the chemical formula for dinitrogen tetroxide | back 22 N₂O₄ |
front 23 Write the chemical formula for diphosphorus pentabromide | back 23 P₂Br₅ |
front 24 Write the chemical formula for nitrogen trichloride | back 24 NCl₃ |
front 25 Write the chemical formula for selenium hexafluoride | back 25 SeF₆ |
front 26 Write the chemical formula for sulfur tetraiodide | back 26 SI₄ |
front 27 Write the chemical formula for tellurium hexaiodide | back 27 TeI₆ |
front 28 Write the chemical formula for tetraphosphorus hexasulfide P₄S₆ | back 28 P₄S₆ |
front 29 Which has the correct name-formula combination? A) Chlorine pentafluoride - ClF B) Diphosphorus pentoxide - P₂O C) Carbon tetraiodide - CI₄ D) Sulfur tetrafluoride - SF | back 29 C) Carbon tetraiodide - CI₄ |
front 30 Which has the incorrect name-formula combination? A) Sulfur dioxide - SO₂ B) Iodine trifluoride - IF C) Nitrogen tribromide - NBr₃ D) Silicon tetrafluoride - SiF₄ | back 30 B) Iodine trifluoride - IF |
front 31 Which of the following is the correct Lewis symbol for a neutral atom of Al? A) see problem image B) see problem image C) see problem image D) see problem image | back 31 C) see problem image |
front 32 Which of the following is the correct Lewis symbol for a neutral atom of F? A) see problem image B) see problem image C) see problem image D) see problem image | back 32 B) see problem image |
front 33 Which of the following is the correct Lewis symbol for a neutral atom of O? A) see problem image B) see problem image C) see problem image D) see problem image | back 33 D) see problem image |
front 34 Which of the following is not a valid Lewis symbol? A) see problem image B) see problem image C) see problem image D) see problem image | back 34 D) see problem image |
front 35 Draw the Lewis structure of ammonia (NH₃). | back 35 |
front 36 Draw the Lewis structure of carbon dioxide (CO₂). | back 36 |
front 37 Draw the Lewis structure of Cl₂. | back 37 |
front 38 Draw the Lewis structure of formaldehyde (H₂CO). | back 38 |
front 39 Draw the Lewis structure of H₂. | back 39 |
front 40 Draw the Lewis structure of N₂. | back 40 |
front 41 Draw the Lewis structure of O₂. | back 41 |
front 42 Draw the Lewis structure of water (H₂O). | back 42 |
front 43 A skeletal structure for SO₂Cl₂ is shown below. Starting from this structure, complete the Lewis structure that follows the octet rule on all atoms. | back 43 |
front 44 Determine the number of valence electrons in HCN and then draw the corresponding Lewis structure. A) 13 B) 12 C) 10 D) 9 E) 7 | back 44 C) 10 |
front 45 Determine the number of valence electrons in POCl₃ and then draw the corresponding Lewis structure (by following the octet rule on all atoms). A) 30 B) 32 C) 28 D) 31 E) 35 | back 45 B) 32 |
front 46 The Lewis structure for NI₃ shown below is incorrect. Starting from this structure, complete the correct structure. | back 46 |
front 47 The Lewis structure for SiS₂ shown below is incorrect. Starting from this structure, complete the correct structure. | back 47 |
front 48 Determine the number of valence electrons in ethene (C₂H₄) and then draw the corresponding Lewis structure. A) 11 B) 13 C) 12 D) 15 E) 14 | back 48 C) 12 |
front 49 The Lewis structure for ethyne (C₂H₂) shown below is incorrect. Starting from this structure, complete the correct structure. | back 49 |
front 50 Determine the number of valence electrons in nitrous acid (HNO₂, sometimes written as HONO) and then draw the corresponding Lewis structure. A) 22 B) 18 C) 19 D) 15 E) 17 | back 50 B) 18 |
front 51 A single bond, compared to a double bond, A) is longer. B) is stronger. C) has a higher bond dissociation energy. D) is not capable of rotation. | back 51 A) is longer. |
front 52 Which of the following has the shortest bond length? A) a single bond B) a double bond C) a triple bond | back 52 C) a triple bond |
front 53 Which of the following has the shortest bond length? A) a single bond B) a double bond C) a triple bond | back 53 C) a triple bond |
front 54 Which one of the following statements best describes electronegativity in atoms? A) Electronegativity is what happens when an atom gains an electron to become an anion. B) Electronegativity is the attraction an element's nucleus has for the electrons in a chemical bond. C) Electronegativity is the energy lost when an atom gains an electron. D) Electronegativity is the energy absorbed when an atom loses an electron. | back 54 B) Electronegativity is the attraction an element's nucleus has for the electrons in a chemical bond. |
front 55 Which one of the following is the least electronegative atom? A) Na B) Cl C) P D) Al | back 55 A) Na |
front 56 Which group in the periodic table tends to have high electronegativity values? A) the alkali metals B) the noble gases C) the halogens D) the transition metals | back 56 C) the halogens |
front 57 Which of the following bonds is a nonpolar covalent bond? A) H - F B) N - F C) F - Cl D) F - F | back 57 D) F - F |
front 58 Which of the following bonds is a polar covalent bond? A) Li - Cl B) Cl - Cl C) H - Cl D) Li - Li | back 58 C) H - Cl |
front 59 Based on their positions in the periodic table, which of the following bonds is the most polar? A) O - F B) C - F C) B - F D) F - F | back 59 C) B - F |
front 60 In a polar covalent bond, A) both atoms in the bond have the same level of electronegativity. B) one atom in the bond must have higher electronegativity than the other atom. C) one atom must be a H atom. D) both atoms in the bond must be metals. | back 60 B) one atom in the bond must have higher electronegativity than the other atom. |
front 61 Which one of the following statements is FALSE? A) Ionic bonding results from the transfer of electrons from one atom to another B) Dipole moments result from the unequal distribution of electrons in a molecule C) The electrons in a polar bond are found nearer to the more electronegative element D) A molecule with very polar bonds can be nonpolar E) Linear molecules cannot have a net dipole moment | back 61 E) Linear molecules cannot have a net dipole moment |
front 62 What is the correct molecular geometry of NH₃ according to Valence Shell Electron Pair Repulsion Theory? A) trigonal planar B) trigonal pyramidal (pyramidal) C) bent D) tetrahedral | back 62 B) trigonal pyramidal (pyramidal) |
front 63 Draw the Lewis structure of chloroform (CHCl₃) and then determine the ideal bonding angle(s) of the central atom. A) 180º B) 90º and 120º C) 109.5º D) 120º E) 135º | back 63 C) 109.5º |
front 64 Draw the Lewis structure of CHOCl and then determine the ideal bonding angle(s) of the central atom. A) 120º B) 45º C) 135º D) 90º E) 60º | back 64 A) 120º |
front 65 Draw the Lewis structure of ClF₃ (with minimized formal charges) and then determine its electron domain and molecular geometries. A) trigonal bipyramidal / pentagonal B) trigonal bipyramidal / t-shaped C) trigonal / pyramidal D) trigonal / square planar E) pyramidal / pentagonal | back 65 B) trigonal bipyramidal / t-shaped |
front 66 Draw the Lewis structure of ethyne (C₂H₂) and then choose the appropriate pair of molecular geometries of the two central atoms. Your answer choice is independent of the orientation of your drawn structure. A) linear / linear B) trigonal / pyramidal C) pyramidal / trigonal D) trigonal pyramidal / trigonal pyramidal E) planar / linear | back 66 A) linear / linear |
front 67 Draw the Lewis structure of H₂CS and then determine its electron domain and molecular geometries. A) planar / tetrahedral B) trigonal planar / linear C) trigonal / trigonal planar D) trigonal planar / trigonal planar E) planar / planar | back 67 D) trigonal planar / trigonal planar |
front 68 Draw the Lewis structure of methanol (CH₃OH) and then choose the appropriate pair of molecular geometries of the two central atoms. Your answer choice is independent of the orientation of your drawn structure. A) bent (109.5º) / bent (120º) B) tetrahedral / bent (109.5º) C) trigonal pyramidal / planar D) planar / trigonal E) bent (120º) / planar | back 68 B) tetrahedral / bent (109.5º) |
front 69 Draw the Lewis structure of ozone (O₃) and then determine its electron domain and molecular geometries. A) planar / trigonal planar B) trigonal planar / bent (120º) C) trigonal / trigonal planar D) planar / trigonal E) pyramidal / pyramidal | back 69 B) trigonal planar / bent (120º) |
front 70 Draw the Lewis structure of PH₃ and then determine its electron domain and molecular geometries. A) tetrahedral / bent (109.5º) B) tetrahedral / trigonal pyramidal C) trigonal / tetrahedral D) planar / trigonal pyramidal E) trigonal planar / trigonal planar | back 70 B) tetrahedral / trigonal pyramidal |
front 71 Draw the Lewis structure of silicon dioxide (SiO₂) and then determine its electron domain and molecular geometries. A) planar / trigonal pyramidal B) trigonal planar / bent (120º) C) planar / trigonal D) linear / pyramidal E) linear / linear | back 71 E) linear / linear |
front 72 Draw the Lewis structure of water (H₂O) and then determine its electron domain and molecular geometries. A) trigonal planar / trigonal B) trigonal planar / planar C) tetrahedral / bent (109.5º) D) tetrahedral / linear E) tetrahedral / trigonal planar | back 72 C) tetrahedral / bent (109.5º) |
front 73 Which of the following bonds is the most polar? A) P - S B) C - Cl C) F - F D) Rb - Br E) All bonds have equal polarity. | back 73 D) Rb - Br |
front 74 Draw the Lewis structure of carbon dioxide (CO₂) and then determine if the molecule is polar or nonpolar. A) Nonpolar B) Polar | back 74 A) Nonpolar |
front 75 Draw the Lewis structure of carbon tetrafluoride (CF₄) and then determine if the molecule is polar or nonpolar. A) Nonpolar B) Polar+ | back 75 A) Nonpolar |
front 76 Draw the Lewis structure of formaldehyde (H₂CO) and then determine if the molecule is polar or nonpolar. A) Nonpolar B) Polar | back 76 B) Polar |
front 77 Draw the Lewis structure of O₂ and then determine if the molecule is polar or nonpolar. A) Nonpolar B) Polar | back 77 A) Nonpolar |
front 78 Draw the Lewis structure of water (H₂O) and then determine if the molecule is polar or nonpolar. A) Nonpolar B) Polar+ | back 78 B) Polar |
front 79 Draw the Lewis structure of PBr₃ and then determine if the molecule is polar or nonpolar. A) Nonpolar B) Polar | back 79 B) Polar |
front 80 How would you determine the formula weight of NaCl? A) Add the mass of sodium (22.99 amu) plus the mass of chlorine together (35.45 amu). B) Multiply the mass of sodium (22.99 amu) by the mass of chlorine (35.45 amu). C) Divide the mass of chlorine (35.45 amu) by the mass by sodium (22.99 amu). D) Subtract the mass of chlorine (35.45 amu) from the mass of sodium (22.99 amu). | back 80 A) Add the mass of sodium (22.99 amu) plus the mass of chlorine together (35.45 amu). |
front 81 What are the similarities in how formula weight and molar mass are calculated? A) Formula weight and molar mass are both calculated by taking the individual atoms' masses in the formula, multiplying them by how many there are in the formula, and then adding the numbers together. B) Formula weight and molar mass are both calculated by taking the individual atoms' masses in the formula, multiplying them by how many there are in the formula, and then subtracting the numbers from each other. C) Formula weight and molar mass are both calculated by taking the individual atoms' masses in the formula, dividing them by how many there are in the formula, and then adding the numbers together. D) Formula weight and molar mass are both calculated by taking the individual atoms mass in the formula, dividing them by how many there are in the formula, and then subtracting the numbers from each other. | back 81 A) Formula weight and molar mass are both calculated by taking the individual atoms' masses in the formula, multiplying them by how many there are in the formula, and then adding the numbers together. |
front 82 Determine the formula weight of KBr. | back 82 119.00 amu |
front 83 Determine the molar mass of CH₃OCH₃. | back 83 46.08 g/mol |
front 84 Determine the molar mass of CH₃OH. | back 84 32.05 g/mol |
front 85 Determine the molar mass of C₆H₁₂O₆. | back 85 180.18 g/mol |
front 86 Which one of the following has the smallest molar mass? A) Ca(NO₃)₂ B) Ca₃N₂ C) Ca(C₂H₃O₂)₂ D) CaSO₄ | back 86 D) CaSO₄ |
front 87 The number of covalent bonds carbon forms in organic compounds is ____. A) 2 B) 3 C) 4 D) 5 E) 6 | back 87 C) 4 |
front 88 Which of the following formulas represents an organic compound? A) KCl B) NH₃ C) Cl₂ D) C₃H₈ E) SiH₄ | back 88 D) C₃H₈ |
front 89 A hydrocarbon is referred to as __________ if all the bonds in the molecule are single bonds. A) aromatic B) saturated C) unsaturated D) planar E) octahedral | back 89 B) saturated |