Chemical Formulas, Equations And The Mole

10 Questions | Total Attempts: 212

SettingsSettingsSettings
AP Chemistry Quizzes & Trivia

AP Chemistry Quiz 3


Questions and Answers
  • 1. 
    What is the correct formula for the compound formed when magnesium reacts with nitrogen?
    • A. 

      MgN2

    • B. 

      Mg3N2

    • C. 

      Mg2N3

    • D. 

      MgN

  • 2. 
    How many iron ions are in the formula for iron(III) phosphate?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 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. 
    The molar mass for copper(II) sulfate pentahydrate is
    • A. 

      149.6 g/mol

    • B. 

      249.6 g/mol

    • C. 

      159.6 g/mol

    • D. 

      259.6 g/mol

  • 5. 
    A substance has an empirical formula of CH2O.  If the molar mass is 90 g/mol, what is the molecular formula?
    • A. 

      CH2O

    • B. 

      C2H4O2

    • C. 

      C3H6O3

    • D. 

      C4H8O4

  • 6. 
    A nitrogen oxide is found to contain 46.66% nitrogen, what is the empirical formula?
    • A. 

      N2O3

    • B. 

      NO

    • C. 

      NO2

    • D. 

      N2O

  • 7. 
    For the reaction of sodium with hydrogen, what mass of sodium hydride is formed from the complete reaction of 2.00 g of hydrogen?
    • A. 

      12 g

    • B. 

      24 g

    • C. 

      96 g

    • D. 

      48 g

  • 8. 
    If 2.00 g of hydrogen gas is combined with 2.00 g of oxygen gas, what mass of water could be produced?
    • A. 

      2.25 g

    • B. 

      3.75 g

    • C. 

      18.0 g

    • D. 

      4.00 g

  • 9. 
    What is the correct formula for sodium peroxide?
    • A. 

      NaO

    • B. 

      Na2O

    • C. 

      Na2O2

    • D. 

      NaO2

  • 10. 
    For the reaction: 3A + 5B -> 2C + D, where 6 mol A is combined with 2.5 mol B, what is the percent yield (by moles) if 0.3 mol D is actually made?
    • A. 

      30%

    • B. 

      40%

    • C. 

      50%

    • D. 

      60%

Back to Top Back to top