Quiz 5 Chemical Reactions and Quantities

Karen Timberlake

Answer the questions below and then click "submit" to send your answers.

  1. Identify the chemical change in the following:

    2. Your answer:
    burning paper
    cutting a piece of thread
    melting ice in a glass
    boiling water in a pan

  2. What is the coefficient needed for Al when the equation Al + Cl2 = AlCl3 is balanced?

    3. Your answer:
    2
    1
    3
    6

  3. Classify the type of reaction for the reaction Fe2S3 = 2Fe + 3S

    4. Your answer:
    double replacement
    decomposition
    combination
    single replacement

  4. How many atoms are in one mole of aluminum atoms?

    5. Your answer:
    1
    6.02 x 10 -23
    6.02
    6.02 x 10 23

  5. What is the molar mass of the antacid Al(OH)3?

    6. Your answer:
    61.0 g/mole
    44.0 g/mole
    78.0 g/mole
    22.0 g/mole

  6. How many grams are in 1.5 moles of P?

    7. Your answer:
    23 g
    46.5 g
    47 g
    22.5 g

  7. How many moles are in 18.2 g of CO2?

    8. Your answer:
    41.4 moles
    2.42 moles
    0.414 moles
    801 moles

  8. What is the mass in grams of 0.250 moles of CH4?

    9. Your answer:
    4.00 g
    64.0 g
    4.0 g
    4 g

  9. What are the possible mole factors for Fe and O2 in the equation 4Fe + 3O2 = 2Fe2O3?

    10. Your answer:
    1 mole Fe/1 mole O2 and 1 mole O2/1 mole Fe
    4 mole Fe/2 mole Fe2O3
    4 mole Fe/1 mole O2 and 1 mole O2/4 mole Fe
    4 mole Fe/3 mole O2 and 3 mole O2/4 mole Fe

  10. Consider the reaction N2 + 3H2 = 2NH3 How many moles of H2 are needed to completely react 56 g of N2?

    11. Your answer:
    1.0 moles of H2
    3.0 moles of H2
    2.0 moles of H2
    6.0 moles of H2

  11. Consider the reaction N2 + 3H2 = 2NH3 How many grams of NH3 are produced when 6.0 g of H2 completely react?

    12. Your answer:
    9.0 g of NH3
    3.0 g of NH3
    4.0 g of NH3
    34 g of NH3

  12. Complete and balance the following combustion reaction C4H8 + O2 =

    13. Your answer:
    C4H8 + O2 = 4CO2 + 4H2 O
    C4H8 + O2 = 4CO2 + H2 O
    C4H8 + 6O2 = 4CO2 + 4H2O
    C4H8 + O2 = CO2

  13. How many grams are in 0.0150 mole of caffeine C8H10N4O2

    14. Your answer:
    2.91 g
    0.825 g
    194 g
    129g

  14. What type of reaction is 2Fe + 3H2SO4 = Fe2(SO4)3 + 3H2?

    15. Your answer:
    double replacement
    decomposition
    combination
    single replacement

  15. Which of the following is an oxidation?

    16. Your answer:
    Fe3+ + e- = Fe2+
    Fe3+ + 3e- = Fe
    Fe = Fe2+ + 2e-
    Cl + e- = Cl-

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