Density And Law Of Conservation Of Mass

9 Questions | Total Attempts: 590

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Density And Law Of Conservation Of Mass

TAKS Objective 4 TEKs 74, 8A, 8C


Questions and Answers
  • 1. 
    What are the units for density?
    • A. 

      G/m

    • B. 

      M/mL

    • C. 

      G/cm3

    • D. 

      Cm3/mL

  • 2. 
    What pieces of equipment are used to calculate the density of a liquid?
    • A. 

      Graduated cylinder, meter stick

    • B. 

      Beaker, stop watch

    • C. 

      Graduated cylinder, triple beam balance

    • D. 

      Beaker, triple beam balance

  • 3. 
    What is the density at 20˚C of 12.0 milliliters of a liquid that has a mass of 4.05 grams?
    • A. 

      0.33 g/mL

    • B. 

      2.96 g/mL

    • C. 

      16.1 g/mL

    • D. 

      48.6 g/mL

  • 4. 
    If all the reactants in a chemical reaction are completely used, which of the following statements accurately describes the relationship between the reactants and the products?
    • A. 

      The products must have different physical state than the reactants.

    • B. 

      The total mass of the reactants must equal the total mass of the products.

    • C. 

      The reactants must contain more complex molecules than the products do.

    • D. 

      The density of the reactants must equal the density of the products.

  • 5. 
    As the viscosity of a liquid increases, the liquid —
    • A. 

      Conducts electricity

    • B. 

      Pours more slowly

    • C. 

      Evaporates more quickly

    • D. 

      Forms a precipitate

  • 6. 
    Which process best demonstrates a chemical change in distilled water?
    • A. 

      Freezing water.

    • B. 

      Separating water into its elements.

    • C. 

      Calculating density.

    • D. 

      Dissolving sugar in water.

  • 7. 
    When a 1-kilogram log was burned, 0.05 kilogram of ash was produced. The mass of the ash is less than the mass of the log because —
    • A. 

      Wind carried away some matter before it burned

    • B. 

      Some matter was converted to gases that were released

    • C. 

      Combustion changed some matter into energy

    • D. 

      Some matter was decomposed by organisms in the soil

  • 8. 
    Use the following reaction to answer the question: K + H2O → KOH + H2What is the coefficient for H2O when the above equation is balanced?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 9. 
    When CaCO3 is heated, it forms CaO and CO2. Which of these statements best describes the mass of the products if 100 g of CaCO3 is heated?
    • A. 

      The difference in the products’ masses is equal to the mass of the CaCO3.

    • B. 

      The sum of the products’ masses is less than the mass of the CaCO3.

    • C. 

      The mass of each product is equal to the mass of the CaCO3.

    • D. 

      The sum of the products’ masses equals the mass of the CaCO3.

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