Wright Unit 5 Chemistry Test

24 Questions | Attempts: 302

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Wright Unit 5 Chemistry Test - Quiz

Questions and Answers
  • 1. 
    What is the molar mass of water?
    • A. 

      18

    • B. 

      18.02

    • C. 

      17.01

    • D. 

      16

  • 2. 
    What is the value used for Avogadro’s number?
    • A. 

      6.0

    • B. 

      6.02

    • C. 

      6.02 x10^23

    • D. 

      6.02 x 10^32

  • 3. 
    Which of the following compounds has a formula with no subscripts?
    • A. 

      Nitrogen dioxide

    • B. 

      Aluminum phosphate

    • C. 

      Sodium hydroxide

    • D. 

      Lithium nitrate

  • 4. 
    A compound  is found to contain 46.66% nitrogen and 53.34 % oxygen, what is the empirical formula?
    • A. 
    • B. 
    • C. 
    • D. 
  • 5. 
    The molar mass for copper(II) sulfate pentahydrate is
    • A. 

      159.6 g/mol

    • B. 

      149.6 g/mol

    • C. 

      259.6 g/mol

    • D. 

      249.6 g/mol

  • 6. 
    A substance has an empirical formula of .  If the molar mass is 90 g/mol, what is the molecular formula?
    • A. 
    • B. 
    • C. 
    • D. 
  • 7. 
    Calculate the number of moles in 8.0 g of sodium hydroxide, NaOH.
    • A. 

      .05

    • B. 

      .10

    • C. 

      .15

    • D. 

      .20

  • 8. 
    In the following formula what is the substance that is reduced? 
    • A. 

      Al

    • B. 
    • C. 
    • D. 

      Cu

  • 9. 
    In the following formula what is the substance that is oxidized? 
    • A. 

      Al

    • B. 
    • C. 
    • D. 

      Cu

  • 10. 
    In the following formula what is the substance that is reducing agent? 
    • A. 

      Al

    • B. 
    • C. 
    • D. 

      Cu

  • 11. 
    In the following formula what is the substance that is oxidizing agent? 
    • A. 

      Al

    • B. 
    • C. 
    • D. 

      Cu

  • 12. 
    What type of reaction is this?
    • A. 

      Synthesis

    • B. 

      Decomposition

    • C. 

      Single replacement

    • D. 

      Double replacement

  • 13. 
    What are the correct coefficients for the following equation?
    • A. 

      2, 4, 4, 2

    • B. 

      1, 2, 3, 1

    • C. 

      1, 2, 2, 1

  • 14. 
     When the above equation is balanced, what is the coefficient for nickle (III) oxide?  
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 15. 
    What kind of reaction does the above equation represent?
    • A. 

      Synthesis

    • B. 

      Decomposition

    • C. 

      Single replacement

    • D. 

      Double replacement

  • 16. 
    What are the reactants in the following equation? H2 + O2 → 2H2
    • A. 

      Hydrogen

    • B. 

      Oxygen

    • C. 

      Water

    • D. 

      Hydrogen and Oxygen

  • 17. 
    Which is the balanced equation for zinc added to sulfuric acid producing hydrogen gas and zinc sulfate?
    • A. 
    • B. 
    • C. 
    • D. 
  • 18. 
    What is the percent of oxygen in Fe2(SO4)3?
    • A. 

      48%

    • B. 

      31%

    • C. 

      35%

    • D. 

      100%

  • 19. 
    How many moles are 345 g of Na?
    • A. 

      5.73 mol

    • B. 

      15.0 mol

    • C. 

      7930 mol

    • D. 

      9.03 mol

  • 20. 
    Propane, C3H8 (g), burns in oxygen to form carbon dioxide and water.  Which equation correctly shows this reaction?    
    • A. 
    • B. 
    • C. 
    • D. 
  • 21. 
    In which situation is a chemical reaction occurring?
    • A. 

      Salt dissolving in water

    • B. 

      A nail rusting

    • C. 

      Ice melting

    • D. 

      A glass window breaking

  • 22. 
    Fossil fuels that contain carbon, such as coal, petroleum and natural gas, combine with oxygen to produce carbon dioxide gas and energy often in the form of heat.  These processes are example of which type of reactions?
    • A. 

      Endothermic reactions

    • B. 

      Metabolic reactions

    • C. 

      Replacement reactions

    • D. 

      Exothermic reaction

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