28) A hydrogen bond is
A) an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom on another molecule.B) a covalent bond between H and O.C) an ionic bond between H and another atom.D) a bond that is stronger than a covalent bond.E) the polar O-H bond in water.Answer: A29) Which of the following molecules can form hydrogen bonds?30) A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution, H2O is theThe solute is the component of lower concentration and the solvent is the component of higher concentration31) In water, a substance that ionizes completely in solution is called a
A weak electrolyte ionizes partially, a strong electrolyte ionizes completely and a nonelectrolyte does not ionize32) In water, a substance that partially ionizes in solution is called aA) weak electrolyte.B) nonelectrolyte.C) semiconductor.D) nonconductor.E) strong electrolyteAnswer: AA weak electrolyte ionizes partially, a strong electrollte ionizes completely and a nonelectrolyte does not ionize33) How many equivalents are present in 5.0 moles of Al3+?Equivalents = moles X charge5.0 X 3 = 15
34) When some of the sugar added to iced tea remains undissolved at the bottom of the glass, thesolution is35) An increase in the temperature of a solution usually36)According to Henry's law, the solubility of a gas in a liquidA) decreases as the gas pressure above the liquid increases.B) increases as the gas pressure above the liquid increases.C) remains the same as the temperature increases.D) depends on the liquid polarity.E) depends on the liquid density.Answer: B
37) The mass percent concentration refers to
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