Chemistry B CFA 1 Review Quiz - Trimester 3 2014

24 Questions | Total Attempts: 527

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Chemistry Quizzes & Trivia

This is the review quiz for the Chemistry B CFA 1. Please take and review answers at the end. You may take this quiz unlimited amount of times until a passing score is achieved. You will be given a test grade for this quiz; therefore please retake until you reach a score of 90% or above.


Questions and Answers
  • 1. 
    Molar Mass of glucose (CO2) in grams per mole? (Hint: Use periodic table and add molecular weights of the atoms)
    • A. 

      340.0

    • B. 

      180.0

    • C. 

      110.0

    • D. 

      78.0

    • E. 

      44.0

  • 2. 
    What is the molar mass of H2 in grams per mole (Hint: Use periodic table and add molecular weights of the atoms)
    • A. 

      15.0

    • B. 

      2.0

    • C. 

      4.0

    • D. 

      5.2

    • E. 

      3.5

  • 3. 
    What is the molar mass of NOin grams per mole. (Hint: Use periodic table and add molecular weights of the atoms)
    • A. 

      16.2

    • B. 

      46.0

    • C. 

      44.0

    • D. 

      13.1

    • E. 

      None of the above

  • 4. 
    What is the molar mass of CH4. (Hint: Use periodic table and add molecular weights of the atoms)
    • A. 

      16 grams per mole

    • B. 

      20 grams per mole

    • C. 

      24 grams per mole

    • D. 

      30 grams per mole

    • E. 

      14 grams per mole

  • 5. 
    A gas in a balloon measures 2.2 L 1.1 atmospheres and 32 degrees Celsius. The environment is changed and the balloon is now 1.8 L and 1.4 atmospheres. What is the new temperature? (Hint 1: Always change temperature to Kelvin scale. To change from Celsius to Kelvin: add 273) Hint 2: Pressure volume and temperature are all changed. Use the combined gas law:
    • A. 

      317.6 K

    • B. 

      33.32 K

    • C. 

      384.3 K

    • D. 

      0.02 K

  • 6. 
    A gas at a temperature of 80Celsius and a volume of 3.2 Liters is brought into an area with the temperature of 100 Celsius, what is the new volume if the pressure remains constant? (Hint : ALL GAS PROBLEMS MUST use the KELVIN temperature scale.) (To change from Celsius to Kelvin: add 273)
    • A. 

      3.38 L

    • B. 

      2.84 L

    • C. 

      3.75 L

    • D. 

      2.4 L

  • 7. 
    If pressure of a gas is 1.2 atmospheres with a volume of 12 L, how much pressure is exerted by the gas if the volume is changed to 9L? (Assume constant temperature)
    • A. 

      .9 L

    • B. 

      129.6 L

    • C. 

      6.0 L

    • D. 

      1.6 L

  • 8. 
    1. According to the Law of Conservation of Matter, the total mass of all the reacting substance is—  
    • A. 

      A. more than the mass of all the products.

    • B. 

      B. more than the total mass of all the products and the reactants.

    • C. 

      C. less than the total mass of all the products.

    • D. 

      D. equal to the mass of all the products.

  • 9. 
    2. What are the coefficients that would correctly balance this reaction? ____Ni + ____C4H8N2O2 → ____Ni(C4H8N2O2)2  
    • A. 

      F. 1, 2, 1

    • B. 

      G. 2, 2, 1

    • C. 

      H. 2, 1, 1

    • D. 

      J. 2, 2, 2

  • 10. 
    3. For the reaction HCl + NaOH --> NaCl + H2O, which reactant is the limiting reactant given 100.0 g of sodium hydroxide and 100.0 g of hydrochloric acid?  
    • A. 

      A. hydrochloric acid

    • B. 

      B. sodium hydroxide

    • C. 

      C. sodium chloride

    • D. 

      D. water

  • 11. 
    4. In the reaction 2RbNO3 → 2RbNO2 + O2, how many moles of O2 are produced when 5.0 mol of RbNO3 decompose?    
    • A. 

      F. 1.0 mol

    • B. 

      G. 2.5 mol

    • C. 

      H. 3.0 mol

    • D. 

      J. 7.5 mol

  • 12. 
    5. In the reaction 2 H2 + O2 → 2 H2O, how many moles of oxygen are required to fully react with 6.0 mol of hydrogen?    
    • A. 

      A. 3.0 mol

    • B. 

      B. 6.0 mol

    • C. 

      C. 12.0 mol

    • D. 

      D. 18.0 mol

  • 13. 
    6. In the reaction 2 H2 + O2 → 2 H2O, what is the mole ratio of hydrogen to water?    
    • A. 

      A. 2 : 2

    • B. 

      B. 2 : 1

    • C. 

      C. 1 : 2

    • D. 

      D. 4 : 4

  • 14. 
    7. In the reaction N2 + 3 H2 → 2 NH3, what is the mole ratio of hydrogen to nitrogen?    
    • A. 

      F. 1 : 1

    • B. 

      G. 1 : 2

    • C. 

      H. 3 : 1

    • D. 

      J. 3 : 2

  • 15. 
    8. A student burns 1.50 mol C3H8 according to the following reaction:          C3H8 + 5O2 → 3CO2 + 4H2O How many grams of carbon dioxide are produced?    
    • A. 

      A. 4.40 × 101 g

    • B. 

      B. 6.61 × 101 g

    • C. 

      C. 1.32 × 102 g

    • D. 

      D. 1.98 × 102 g

  • 16. 
    9. A three (3.00) mole sample of K2S would have how many atoms of potassium?    
    • A. 

      F. 2.01 x 1023

    • B. 

      G. 1.21 x 1024

    • C. 

      H. 1.81 x 1024

    • D. 

      J. 3.62 x 1024

  • 17. 
    11. What is the percent of hydrogen in methane, CH4?    
    • A. 

      F. 16.0

    • B. 

      G. 25.1

    • C. 

      H. 74.9

    • D. 

      J. 100.0

  • 18. 
    12. Which of the following is the mass in grams of 4.25 × 10³ mol of N2?    
    • A. 

      A. 2.35 × 10-4 g

    • B. 

      B. 1.52 × 102 g

    • C. 

      C. 5.95× 104 g

    • D. 

      D. 1.19 × 105 g

  • 19. 
    13. What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?    
    • A. 

      F. 100 atm

    • B. 

      G. 0.90 atm

    • C. 

      H. 1.0 atm

    • D. 

      J. 9.0 atm

  • 20. 
    13. What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?  
    • A. 

      F. 100 atm

    • B. 

      G. 0.90 atm

    • C. 

      H. 1.0 atm

    • D. 

      J. 9.0 atm

  • 21. 
    14. If the temperature of a gas changes, but the number of moles and volume remain constant, which of the following values must also change?  
    • A. 

      A. density

    • B. 

      B. pressure

    • C. 

      C. number of atoms

    • D. 

      D. mass

  • 22. 
    15. A sample of a gas in a rigid container at 30.0°C and 2.00 atm has its temperature increased to 40.0°C. What will be the new pressure?  
    • A. 

      F. 1.03 atm

    • B. 

      G. 1.94 atm

    • C. 

      H. 2.07 atm

    • D. 

      J. 6.04 atm

  • 23. 
    12. Calculate the approximate volume of a 1.50 mol sample of gas at 15.0oC and a pressure of 3.75 atm.    
    • A. 

      A. 1.73 L

    • B. 

      B. 5.93 L

    • C. 

      C. 8.65 L

    • D. 

      D. 9.46 L

  • 24. 
    13. The volume of a gas is 50.0 mL at 20.0 K. What will be the new temperature if the gas is compressed to 10.0 mL under constant pressure?    
    • A. 

      F. 2.50 K

    • B. 

      G. 3.00 K

    • C. 

      H. 4.00 K

    • D. 

      J. 5.00 K

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