Problem 1RCC: How many electrons can occupy the first shell? How many can occupy the second shell? Problem 2RCC: Which electrons are represented by an electron-dot structure? Problem 3RCC Problem 4RCC: How does an ion differ from an atom? Problem 5RCC: To become a negative ion, does an atom lose or gain electrons? Problem 6RCC Problem 7RCC Problem 8RCC Problem 9RCC Problem 10RCC Problem 11RCC Problem 12RCC Problem 13RCC: Why do nonpolar substances boil at relatively low temperatures? Problem 14RCC: Which has a greater degree of symmetry-a polar molecule or a nonpolar molecule? Problem 15RCC: Why dont oil and water mix? Problem 16RCC Problem 17RCC: What is a hydrogen bond? Problem 18RCC: Are induced dipoles permanent? Problem 19RCC: What happens to the volume of a sugar solution as more sugar is dissolved in it? Problem 20RCC Problem 21RCC: Is concentration typically given with the volume of solvent or the volume of solution? Problem 22RCC: Why does the solubility of a gas solute in a liquid solvent decrease with increasing temperature? Problem 23RCC: Why do sugar crystals dissolve faster when crushed? Problem 24RCC: Is sugar a polar or nonpolar substance? Problem 25TIS: Do metals more readily gain or lose electrons? Problem 26TIS: What is an alloy? Problem 27TIS: What is a native metal? Problem 28TIS Problem 29TIS Problem 30TIS: How is a solution different from a suspension? Problem 36TC Problem 37TC Problem 38TC: Rank the following in order of increasing symmetry: a CH4, b NH3, c H2O. Problem 39TC: Rank the following in order of decreasing boiling point: a CH4, b NH3, c H2O. Problem 40TC: Rank these solutions in order of increasing concentration: a 0.5 mole of sucrose in 2.0L of... Problem 41TC: Rank the following compounds in order of increasing solubility in water: CH3CH2OH Ethanol... Problem 42TS Problem 43TS Problem 44TS Problem 45TS: How much sodium chloride, in grams, is needed to make 15L of a solution that has a concentration of... Problem 46TS: If water is added to 1mole of sodium chloride in a flask until the volume of the solution is 1L,... Problem 47TE Problem 48TE Problem 49TE: How many more electrons can fit within the valence shell of a hydrogen atom? Problem 50TE Problem 51TE: What happens when hydrogens electron gets close to the outermost shell of a fluorine atom? Problem 52TE: Why does an atom with few valence electrons tend to lose these electrons rather than gain more? Problem 53TE: Why it is so easy for a magnesium atom to lose two electrons? Problem 54TE: Why doesnt the neon atom tend to lose or gain any electrons? Problem 55TE: Sulfuric acid, H2SO4, loses two protons to form what polyatomic ion? What molecule loses a proton to... Problem 56TE Problem 57TE: Which should be more difficult to pull apart: a sodium ion from a chloride ion or a potassium ion... Problem 58TE: Given that the total number of atoms on our planet remains fairly constant, how is it ever possible... Problem 59TE Problem 60TE: Two fluorine atoms join together to form a covalent bond. Why dont two potassium atoms do the same... Problem 61TE: How are metallic bonds similar to ionic bonds? How are they different? Problem 62TE: What drives an atom to form a covalent bond: its nuclear charge or the need to have a filled outer... Problem 63TE: Atoms of nonmetallic elements form covalent bonds, but they can also form ionic bonds. How is this... Problem 64TE Problem 65TE Problem 66TE Problem 67TE: In each molecule, which atom carries the greater positive charge: H-ClBr-FCOBr-Br Problem 68TE: Which is more polar: a sulfur-bromineS-Br bond or a selenium-chlorine S-Cl bond? Problem 69TE: True or False: The greater the nuclear charge of an atom, the greater the electro negativity. Please... Problem 70TE: True or False: The more shells in an atom, the lower its electronegativity. Please explain. Problem 71TE: Water, H2O, and methane, CH4, have about the same mass and differ by only one type of atom. Why is... Problem 72TE: Circle the molecule from each pair that should have a higher boiling point atomic numbers: a Cl=17 b... Problem 73TE: Three kids sitting equally apart around a table are sharing jelly beans. One of the kids, however,... Problem 74TE: Why is the oxygen atom of a water molecule slightly negative in charge? Problem 75TE: Look to the molecules listed in Table 12.2. How are the molecular shapes of the polar and nonpolar... Problem 76TE: Which is stronger: the covalent bond that holds atoms together within a molecule or the electrical... Problem 77TE: The charges with sodium chloride are all balanced-for every positive sodium ion there is a... Problem 78TE Problem 79TE Problem 80TE: Why is calcium fluoride, CaF2, a high melting point crystalline solid, whereas stannic chloride,... Problem 81TE: Of the two structures shown here, one is a typical gasoline molecule and the other is a typical... Problem 82TE: Mixtures can be separated into their components by taking advantage of differences in the chemical... Problem 83TE: Why cant the elements of a compound be separated from one another by physical means? Problem 84TE: Many dry cereals are fortified with iron, which is added to the cereal in the form of small iron... Problem 85TE: Classify the following as element, compound, or mixture, and justify your classifications: salt,... Problem 86TE: Which of the following boxes best represents a suspension? Which best represents a solution? Which... Problem 87TE: Which is more dense: air saturated with water vapor or air unsaturated with water vapor? Problem 88TE: How many sugar molecules are there in a 2M sugar solution? Problem 89TE Problem 90TE: Which should weigh more: 100mL of fresh water or 100mL of fresh sparkling seltzer water? Why? Which... Problem 91TE Problem 92TE: The boiling point of 1, 4-butanediol is 230C. Would you expect this compound to be soluble or... Problem 93TE: Based on atomic size, which would you expect to be more soluble in water: helium, He, or nitrogen,... Problem 94TE: If nitrogen, N2, were pumped into your lungs at high pressure, what would happen to its solubility... Problem 95TE Problem 96TE: Account for the observation that ethanol, C2H5OH, dissolves readily in water but dimethyl ether,... Problem 97TE: At 10C, which is more concentrated: a saturated solution of sodium nitrate, NaNO3, or a saturated... Problem 98TE: Why is rain or snow called precipitation? Problem 99TE: Hydrogen chloride HCl is a gas at room temperature. Would you expect this material to be very... Problem 100TE: Some bottled water is now advertised as containing extra quantities of "Vitamin O," which is a... Problem 101TE: Two plastic bottles of fresh seltzer water are opened. Three-fourths of the first bottle are poured... Problem 102TE: Would you expect to find more dissolved oxygen in ocean water around the northern latitudes or in... Problem 103TDI: What should be done with mining pits after all their ore has been removed? Consider the open-pit... Problem 104TDI: What are some of the obstacles people face when trying to recycle materials? How might these... Problem 105TDI: Oxygen, O2, dissolves quite well within a class of com-pounds known as liquid perfluorocarbonsso... Problem 1RAT Problem 2RAT Problem 3RAT: Why are ores so valuable? a They are sources of naturally occurring gold. b Metals can be... Problem 4RAT: In terms of the periodic table, is there an abrupt or gradual change between ionic and covalent... Problem 5RAT: When nitrogen and fluorine combine to form a molecule, the most likely chemical formula is: a N3F. b... Problem 6RAT Problem 7RAT: Someone argues that you shouldnt drink tap water because it contains hundreds of molecules of some... Problem 8RAT Problem 9RAT: Fish dont live very longer in water that has just been boiled and brought back to room temperature.... Problem 10RAT format_list_bulleted