true or false: (2 pts each)\n1) a glass of ice water containing nine ice cubes will be colder than a similar…

true or false: (2 pts each)\n1) a glass of ice water containing nine ice cubes will be colder than a similar - size glass of ice water containing only three ice cubes.\n2) acids produce h+ ions in solution.\n3) for hydrogen bonding to occur, a molecule must have a hydrogen atom bonded directly to a fluorine, oxygen, or nitrogen atom.\n4) dipole - dipole forces are weaker than dispersion forces.\n5) salt water is an example of a strong electrolyte solution.\n6) the solubility of gases in water decreases with increasing temperature.\n7) gases typically have high densities in comparison to solids.\n8) vitamin c is a water - soluble vitamin, so it is likely that this vitamin is polar.\n9) one liter of 6.0 m hno3 contains the same number of h+ ions as does one liter of 6.0 m h2so4.\n10) osmosis is the process in which a solvent moves from an area of low solute concentration to an area of high solute concentration.\nmultiple choice (3 points each)\n11) a mothball can change directly from its solid phase to its gaseous phase. this process is known as:\na) deposition.\nb) melting.\nc) condensation.\nd) sublimation.\ne) none of the above\n12) which intermolecular force is present in all molecules and atoms?\na) dispersion forces\nb) dipole - dipole forces\nc) hydrogen bonding\nd) ionic bonding\ne) none of the above

true or false: (2 pts each)\n1) a glass of ice water containing nine ice cubes will be colder than a similar - size glass of ice water containing only three ice cubes.\n2) acids produce h+ ions in solution.\n3) for hydrogen bonding to occur, a molecule must have a hydrogen atom bonded directly to a fluorine, oxygen, or nitrogen atom.\n4) dipole - dipole forces are weaker than dispersion forces.\n5) salt water is an example of a strong electrolyte solution.\n6) the solubility of gases in water decreases with increasing temperature.\n7) gases typically have high densities in comparison to solids.\n8) vitamin c is a water - soluble vitamin, so it is likely that this vitamin is polar.\n9) one liter of 6.0 m hno3 contains the same number of h+ ions as does one liter of 6.0 m h2so4.\n10) osmosis is the process in which a solvent moves from an area of low solute concentration to an area of high solute concentration.\nmultiple choice (3 points each)\n11) a mothball can change directly from its solid phase to its gaseous phase. this process is known as:\na) deposition.\nb) melting.\nc) condensation.\nd) sublimation.\ne) none of the above\n12) which intermolecular force is present in all molecules and atoms?\na) dispersion forces\nb) dipole - dipole forces\nc) hydrogen bonding\nd) ionic bonding\ne) none of the above

Answer

Brief Explanations:

  1. The temperature of ice - water mixtures at equilibrium is the same regardless of the number of ice cubes, so it's false.
  2. By definition, acids produce H⁺ ions in solution, so it's true.
  3. Hydrogen bonding requires a hydrogen atom bonded directly to F, O, or N, so it's true.
  4. Dipole - dipole forces are generally stronger than dispersion forces for molecules of similar size, so it's false.
  5. Salt (NaCl) dissociates completely in water, making salt water a strong electrolyte solution, so it's true.
  6. The solubility of gases in water decreases with increasing temperature, so it's true.
  7. Gases typically have low densities compared to solids, so it's false.
  8. Water - soluble substances are often polar, so since vitamin C is water - soluble, it's likely polar, so it's true.
  9. HNO₃ is a monoprotic acid and H₂SO₄ is a diprotic acid. One liter of 6.0 M H₂SO₄ has twice the number of H⁺ ions as one liter of 6.0 M HNO₃, so it's false.
  10. Osmosis is the movement of a solvent from an area of high solvent concentration (low solute concentration) to an area of low solvent concentration (high solute concentration), so it's false.
  11. The direct change from solid to gas is sublimation, so the answer is D.
  12. Dispersion forces are present in all molecules and atoms, so the answer is A.

Answer:

  1. False
  2. True
  3. True
  4. False
  5. True
  6. True
  7. False
  8. True
  9. False
  10. False
  11. D. sublimation
  12. A. dispersion forces