Problem 1E: Does a cation gain protons to form a positive charge or does it lose electrons? Problem 2E: Iron(III) sulfate [Fe2( SO 4)3] is composed of Fe3+ and SO42 ions. Explain why a sample of iron(III)... Problem 3E: Which of the following atoms would be expected to form negative ions in binary ionic compounds and... Problem 4E: Which of the following atoms would be expected to form negative ions in binary ionic compounds and... Problem 5E: Predict the charge on the monatomic ions formed from the following atoms in binary ionic compounds:... Problem 6E: Predict the charge on the monatomic ions formed from the following atoms in binary ionic compounds:... Problem 7E: Write the electron configuration for each of the following ions: (a) As3 (b) I (c) Be2+ (d) Cd2+ (e)... Problem 8E: Write the electron configuration for the monatomic ions formed from the following elements (which... Problem 9E: Write out the full electron configuration for each of the following atoms and for the monatomic ion... Problem 10E: From the labels of several commercial products, prepare a list of six ionic compounds in the... Problem 11E: Why is it incorrect to speak of a molecule of solid NaCl? Problem 12E: What information can you use to predict whether a bond between two atoms is covalent or ionic? Problem 13E: Predict which of the following compounds are ionic and which are covalent, based on the location of... Problem 14E: Explain the difference between a nonpolar covalent bond, a polar covalent bond, and an ionic bond. Problem 15E: From its position in the periodic table, determine which atom in each pair is more electronegative:... Problem 16E: From its position in the periodic table, determine which atom in each pair is more electronegative:... Problem 17E: From their positions in the periodic able, arrange the atoms in each of the following series in... Problem 18E: From their positions in the periodic table, arrange the atoms in each of the following series in... Problem 19E: Which atoms can bond to sulfur so as to produce a positive partial charge on the sulfur atom? Problem 20E: Which is the most polar bond? (a) CC (b) CH (c) NH (d) OH (e) Se-H Problem 21E: Identify the more polar bond in each of the following pairs of bonds: (a) HF or HCl (b) NO or CO... Problem 22E: Which of the following molecules or ions contain polar bonds? (a) O3 (b) S8 (c) O22 (d) NO3 (e) CO2... Problem 23E: Write the Lewis symbols for each of the following ions: (a) As3 (b) I (c) Be2+ (d) O2 (e) Ga3+ (f)... Problem 24E: Many monatomic ions are found in seawater, including the ions formed from the following list of... Problem 25E: Write the Lewis symbols of the ions in each of the following ionic compounds and the Lewis symbols... Problem 26E: Iii (he Lewis structures listed here, M and X represent various elements iii the third period of the... Problem 27E: Write the Lewis structure for the diatomic molecule P2, an unstable form of phosphorus found in high... Problem 28E: Write Lewis structures for the following: (a) H2 (b) HBr (c) PCl3 (d) SF2 (e) H2CCH2 (f) HNNH (g)... Problem 29E: Write Lewis structures for the following: (a) O2 (b) H2CO (c) AsF3 (d) ClNO (e) SiCl4 (f) H3O+ (g)... Problem 30E: Write Lewis structures for the following: (a) ClF3 (b) PCl5 (c) BF3 (d) PF6 Problem 31E: Write Lewis structures for the following: (a) SeF6 (b) XeF4 (c) SeCl3+ Problem 32E: Write Lewis structures for: (a) PO43 (b) ICl4 (c) SO32 (d) HONO Problem 33E: Correct the following statement: The bonds in solid PbCl2 are ionic; the bond in a HCl molecule is... Problem 34E: Write Lewis structures for the following molecules or ions: (a) SbH3 (b) XeF2 (c) Se8 (a cyclic... Problem 35E: Methanol, H3COH, is used as the fuel in some race cars. Ethanol, C2H5OH, is used extensively as... Problem 36E: Many planets in our solar system contain organic chemicals including methane (CH4) and traces of... Problem 37E: Carbon tetrachloride was formerly used in fire extinguishers for electrical fires. It is no longer... Problem 38E: Identify the atoms that correspond to each of the following electron configurations. Then, write the... Problem 39E: The arrangement of atoms in several biologically important molecules is given here. Complete the... Problem 40E: A compound with a molar mass of about 28 g/mol contains 85.7% carbon and 14.3% hydrogen by mass.... Problem 41E: A compound with a molar mass of about 42 g/mol contains 85.7% carbon and 14.3% hydrogen by mass.... Problem 42E: Two arrangements of atoms are possible for a compound with a molar mass of about 45 g/mol that... Problem 43E: How are single, double, and triple bonds similar? How do they differ? Problem 44E: Write resonance forms that describe the distribution of electrons in each of these molecules or... Problem 45E: Write resonance forms that describe the distribution of electrons in each of these molecules or... Problem 46E: Write the resonance forms of ozone, Q3, the component of the upper atmosphere that protects the... Problem 47E: Sodium nitrite, which has been used to preserve bacon and other meats, is an ionic compound. Write... Problem 48E: In terms of the bonds present, explain why acetic acid, CH3CO2H, contains two distinct types of... Problem 49E: Write the Lewis structures for the following, and include resonance structures where appropriate.... Problem 50E: Toothpastes containing sodium hydrogen carbonate (sodium bicarbonate) and hydrogen peroxide are... Problem 51E: Determine the formal charge of each element in the following: (a) HCl (b) CF4 (c) PCl3 (d) PF5 Problem 52E: Determine the formal charge of each element in the following: (a) H3O+ (b) SO42 (c) NH3 (d) O22 (e)... Problem 53E: Calculate the formal charge of chlorine in the molecules Cl2, BeCl2, and ClF5. Problem 54E: 54. Calculate the formal charge of each element in the following compounds and ions: (a) F2CO (b) NO... Problem 55E: Draw all possible resonance structures for each of these compounds. Determine the formal charge on... Problem 56E: Based on formal charge considerations, which of the following would likely be the correct... Problem 57E: Based on formal charge considerations, which of the following would likely be the correct... Problem 58E: Based on formal charge considerations, which of the following would likely be the correct... Problem 59E: Draw the structure of hydroxylamine, H3NO, and assign formal charges; look up the structure. Is the... Problem 60E: Iodine forms a series of fluorides (listed here). Write Lewis structures for each of the four... Problem 61E: Write the Lewis structure and chemical formula of the compound with a molar mass of about 70 g/mol... Problem 62E: Which of the following structures would we expect for nitrous acid? Determine the formal charges: Problem 63E: Sulfuric acid is the industrial chemical produced in greatest quantity worldwide. About 90 billion... Problem 64E: Which bond in each of the following pairs of bonds is the strongest? (a) CCorC=C (b) CNorCN (c)... Problem 65E: Using the bond energies in Table 7.2, determine the approximate enthalpy change for each of the... Problem 66E: Using the bond energies in Table 7.2, determine the approximate enthalpy change for each of the... Problem 67E: When a molecule can form two different structures, the structure with the stronger bonds is usually... Problem 68E: How does the bond energy of HCl(g) differ from the standard enthalpy of formation of HCl(g)? Problem 69E: Using the standard enthalpy of formation data in Appendix G, show how the standard enthalpy of... Problem 70E: Using the standard enthalpy of formation data in Appendix G, calculate the bond energy of the... Problem 71E: Using the standard enthalpy of formation data in Appendix G, determine which bond is stronger: the... Problem 72E: Using the standard enthalpy of formation data in Appendix G. determine which bond is stronger: the... Problem 73E: Complete the following Lewis structure by adding bonds (not atoms), and then indicate the longest... Problem 74E: Use the bond energy to calculate an approximate value of H for the following reaction. Which is the... Problem 75E: Element First Ionization Energy (kJImol) Second Ionization Energy (kiImol) I K 419 3050 Ca 590 1140... Problem 76E: The lattice energy of LiF is 1023 kJ/mol, and the Li—F distance is 200.8 pm. NaF crystallizes in the... Problem 77E: For which of the following substances is the least energy required to convert one mole of the solid... Problem 78E: The reaction of a metal, M, with a halogen, X2, proceeds by an exothermic reaction as indicated by... Problem 79E: The lattice energy of LiF is 1023 kJ/mol, and the LiF distance is 201 pm. MgO crystallizes in the... Problem 80E: Which compound in each of the following pairs has the larger lattice energy? Note: Mg2+ and Li+ have... Problem 81E: Which compound in each of the following pairs has the larger lattice energy? Note: Ba2+ and K+ have... Problem 82E: Which of the following compounds requires the most energy to convert one mole of the solid into... Problem 83E: Which of the following compounds requires the most energy to convert one mole of the solid into... Problem 84E: The lattice energy of KF is 794 kJ/mol, and the interionic distance is 269 pm. The Na—F distance in... Problem 85E: Explain why the HOH molecule is bent, whereas the HBeH molecule is linear. Problem 86E: What feature of a Lewis structure can be used to tell if a molecule’s (or ion’s) electron-pair... Problem 87E: Explain the difference between electron-pair geometry and molecular structure. Problem 88E: Why is the HNH angle in NH3 smaller than the HCH bond angle in CH4? Why is the HNH angle in NH4+... Problem 89E: Explain how a molecule that contains polar bonds can be nonpolar. Problem 90E: As a general rule, MX molecules (where M represents a central atom and X represents terminal atoms;... Problem 91E: Predict the electron pair geometry and the molecular structure of each of the following molecules or... Problem 92E: Identify the electron pair geometry and the molecular structure of each of the following molecules... Problem 93E: What are the electron-pair geometry and the molecular structure of each of the following molecules... Problem 94E: Predict the electron pair geometry and the molecular structure of each of the following ions: (a)... Problem 95E: Identify the electron pair geometry and the molecular structure of each of the following molecules:... Problem 96E: Predict the electron pair geometry and the molecular structure of each of the following: (a) IOF5 (I... Problem 97E: Which of the following molecules and ions contain polar bonds? Which of these molecules and ions... Problem 98E: Which of these molecules and ions contain polar bonds? Which of these molecules and ions have dipole... Problem 99E: Which of the following molecules have dipole moments? (a) CS2 (b) SeS2 (c) CCl2F2 (d) PCl3 (P is the... Problem 100E: Identify the molecules with a dipole moment: (a) SF4 (b) CF4 (c) Cl2CCBr2 (d) CH3Cl (e) H2CO Problem 101E: The molecule XF3 has a dipole moment. Is X boron or phosphorus? Problem 102E: The molecule XCl2 has a dipole moment. Is X beryllium or sulfur? Problem 103E: Is the Cl2BBCl2 molecule polar or nonpolar? Problem 104E: There are three possible structures for PCl2F3 with phosphorus as the central atom. Draw them and... Problem 105E: Describe the molecular structure around the indicated atom or atoms: (a) the sulfur atom in sulfuric... Problem 106E: Draw the Lewis structures and predict the shape of each compound or ion: (a) CO2 (b) NO2 (c) SO3... Problem 107E: A molecule with the formula AB2, in which A and B represent different atoms, could have one of three... Problem 108E: A molecule with the formula AB3, in which A and B represent different atoms, could have one of three... Problem 109E: Draw the Lewis electron dot structures for these molecules, including resonance structures where... Problem 110E: What is the molecular structure of the stable form of FNO2? (N is the central atom.) Problem 111E: A compound with a molar mass of about 42 g/mol contains 85.7% carbon and 14.3% hydrogen. What is its... Problem 112E: Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises... Problem 113E: Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises... Problem 114E: Use the Molecule Shape simulator (http://openstaxcollege.org/I/6MolecShape) to build a molecule.... Problem 115E: Use the Molecule Shape simulator (http://openstaxcollege.org/l/16MolecShape) to explore real... Problem 116E: Use the Molecule Shape simulator (http://openstaxcollege.org/l/16MolecShape) to explore real... format_list_bulleted