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5 Written Questions

5 Matching Questions

  1. Draw functional group structure and give molecular formula for: Phosphate.
  2. What is a hydrocarbon? Polar or non-polar?
  3. Why is water in the solid phase less dense? How does this support life?
  4. What are emergent properties of water?
  5. Draw functional group structure and give molecular formula for: Amino.
  1. a Special abilities water takes on when combined with itself (only works with large amounts of molecules, not just a single molecule)
  2. b Organic molecules composed solely of Carbon and Hydrogen; Nonpolar covalent bond so they resist/repel water (ex: fat)
  3. c Amino (-NH₂) (acts as a base, amino acids); N single bonded to 2 H's


    Ex: Glycine
  4. d Phosphate (−OPO₃²⁻) (acid: DNA, cell membrane, ATP); P double to O, single to O, 2 O⁻



    Ex: glycerol phosphate
  5. e Hydrogen bonds keep the molecules spread out, so they don't pack together, making them less dense.
    The floating ice insulates the body of water underneath it; if ice sank, then all the bodies of water would freeze solid, making life unlivable.

5 Multiple Choice Questions

  1. (see p. 1 slide 4 in ch. 3)
  2. Acids raise the concentration of H⁺ ions in an aqueous solution (decreases the pH number)
    Bases lower the concentration of H⁺ ions (increases the pH number)
  3. Resistance to change in temperature
  4. Heat required to convert 1g of liquid into a gaseous state (high); Evaporative cooling is the warmest molecules of a liquid leave as a gas; allows us to sweat, or release heat so we don't die
  5. 1.) Structural - changes structural form; same formula, different structure
    2.) Geometric - differ in spatial arrangement due to inflexibility of double bond (two types: cis and trans) 3.) Enantiomers - mirror images of each other

5 True/False Questions

  1. Be able to calculate the molar concentrations of hydrogen and hydroxide ions from a given pH value or vice versa.H⁺ = 10⁻⁷ and OH⁻ = 10⁻⁷ Equation: [H⁺][ OH⁻] = 10⁻¹⁴ (always = to 14)


  2. Draw functional group structure and give molecular formula for: Carbonyl.
    Carbonyl (>CO) (ketones, aldehydes, sugars); C double bonded to O



    Ex: Acetone, the simplest ketone


  3. What are primary producers?Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH


  4. What is the Universal Solvent?WATER!


  5. Know functional group NAMES, MOLECULAR FORMULAS, and STRUCTURES!Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl


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