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5 Written questions

5 Matching questions

  1. Temperature
  2. Buffers
  3. Compound
  4. Ocean Acidification
  5. Evaporative Cooling
  1. a occurs because the molecules with the greates energy leave.
  2. b Decreasing pH of ocean waters due to absoprtion of excess atmospheric CO2 from the burning of fossil fuels.
  3. c A chemical substance that resists changes in pH by accepting hydrogen ions from or donating hydrogen ions to solutions.

    substance that minimize changes in pH.
  4. d a substance consisting of two or more different elements combined in a fixed ratio.
  5. e Measures the intensity of heat.

5 Multiple choice questions

  1. Oxygen, carbon, hydrogen, and nitrogen.
  2. A substance that decreases the hydrogen ion concentration in a solution. 14 is a strong base on the pH scale.
  3. An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
  4. The total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.
  5. A molecule containing polar covalent bonds and having an unequal distribution of charges.

5 True/False questions

  1. IsotopesOne of several atomic forms of an element, each with teh same number of protons but different number of neutrons.


  2. ElementThe dissolving agent of a solution. Water is the most versatile solvent known.


  3. The nucleus of an atom contains...??A covalent bond in which electrons are shared equally between two atoms of similar electronegativity.


  4. Fourth shell of an atom can contain how many electrons?18


  5. AcidA substance that increases the hydrogen ion concentration in a solution. 0 on pH scale is a strong acid.


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