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Chemical Equations & Stoichiometry

Quiz by Nafisah M. Abdulrachman

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25 questions
Show answers
  • Q1
    What is the balanced equation for the reaction of aluminum with oxygen to form aluminum oxide?
    3 Al + 2 O2 -> Al2O3
    4 Al + O2 -> 2 Al2O3
    4 Al + 3 O2 -> 2 Al2O3
    2 Al + 3 O2 -> Al2O3
    30s
  • Q2
    What is the correctly balanced equation for the reaction of hydrogen and nitrogen to form ammonia?
    N2 + 3 H2 -> 2 NH3
    N2 + 3 H2 -> NH3
    N2 + H2 -> NH3
    N2 + 2 H2 -> NH3
    30s
  • Q3
    What is the balanced chemical equation for the reaction between sodium hydroxide (NaOH) and sulfuric acid (H2SO4)?
    2 NaOH + H2SO4 -> Na2SO4 + 2 H2O
    NaOH + H2SO4 -> Na2SO4 + H2O
    2 NaOH + H2SO4 -> Na2SO4 + H2O
    NaOH + H2SO4 -> NaHSO4 + H2O
    30s
  • Q4
    What is the balanced equation for the reaction of magnesium with hydrochloric acid to produce magnesium chloride and hydrogen gas?
    Mg + 2 HCl -> MgCl2 + H2
    Mg + 2 HCl -> MgCl + H2
    Mg + HCl -> MgCl + H2
    Mg + 2 HCl -> MgCl2 + 2 H2
    30s
  • Q5
    What is the balanced equation for the reaction of zinc (Zn) with sulfuric acid (H2SO4) to produce zinc sulfate and hydrogen gas?
    Zn + 2 H2SO4 -> ZnSO4 + 2 H2
    2 Zn + H2SO4 -> ZnSO4 + H2
    Zn + H2SO4 -> ZnSO4 + 2 H2
    Zn + H2SO4 -> ZnSO4 + H2
    30s
  • Q6
    What is the balanced equation for the decomposition of potassium chlorate (KClO3) into potassium chloride (KCl) and oxygen (O2)?
    KClO3 -> 2 KCl + 3 O2
    2 KClO3 -> KCl + 3 O2
    2 KClO3 -> 2 KCl + 3 O2
    KClO3 -> KCl + O2
    30s
  • Q7
    What is the balanced equation for the reaction of ethylene (C2H4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O)?
    2 C2H4 + 7 O2 -> 4 CO2 + 6 H2O
    C2H4 + 3 O2 -> 2 CO2 + H2O
    C2H4 + 4 O2 -> 2 CO2 + 4 H2O
    C2H4 + 5 O2 -> 2 CO2 + 4 H2O
    30s
  • Q8
    What is the balanced equation for the reaction of ethylene (C2H4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O)?
    2C2H4 + 7O2 -> 4CO2 + 6H2O
    C2H4 + 3O2 -> 2CO2 + 2H2O
    C2H4 + O2 -> CO2 + H2O
    C2H4 + 5O2 -> 3CO2 + 4H2O
    30s
  • Q9
    What is the balanced equation for the reaction of zinc (Zn) with sulfuric acid (H2SO4) to produce zinc sulfate (ZnSO4) and hydrogen gas (H2)?
    Zn + H2SO4 -> ZnSO4 + 3H2
    2Zn + H2SO4 -> 2ZnSO4 + H2
    Zn + 2H2SO4 -> ZnSO4 + 2H2
    Zn + H2SO4 -> ZnSO4 + H2
    30s
  • Q10
    What is the balanced equation for the synthesis reaction between iron (Fe) and sulfur (S) to form iron sulfide (FeS)?
    Fe + 2S -> FeS2
    Fe + S2 -> FeS
    2Fe + S -> Fe2S
    Fe + S -> FeS
    30s
  • Q11
    What is the balanced equation for the reaction of calcium carbonates (CaCO3) decomposing into calcium oxide (CaO) and carbon dioxide (CO2)?
    CaCO3 -> CaO + 2CO2
    2CaCO3 -> CaO + CO2
    CaCO3 -> CaO + CO2
    CaCO3 -> 2CaO + CO2
    30s
  • Q12
    What is the balanced equation for the reaction of aluminum (Al) with hydrochloric acid (HCl) to produce aluminum chloride (AlCl3) and hydrogen gas (H2)?
    4Al + 12HCl -> 4AlCl3 + 6H2
    2Al + 6HCl -> 2AlCl3 + 3H2
    Al + 3HCl -> AlCl3 + H2
    Al + 2HCl -> AlCl3 + H2
    30s
  • Q13
    What is the balanced equation for the decomposition of potassium chlorate (KClO3) into potassium chloride (KCl) and oxygen gas (O2)?
    2KClO3 -> KCl + O2
    KClO3 -> KCl + O2
    KClO3 -> KCl + 3O2
    2KClO3 -> 2KCl + 3O2
    30s
  • Q14
    What is the balanced equation for the reaction of nitrogen gas (N2) with hydrogen gas (H2) to form ammonia (NH3)?
    N2 + 2H2 -> NH3
    2N2 + 6H2 -> 4NH3
    N2 + 3H2 -> 2NH3
    N2 + H2 -> NH3
    30s
  • Q15
    What is the balanced equation for the combustion of propane (C3H8)?
    C3H8 + 4O2 -> 3CO2 + 6H2O
    C3H8 + 5O2 -> 3CO2 + 4H2O
    C3H8 + 3O2 -> 3CO2 + 2H2O
    C3H8 + 2O2 -> 3CO2 + H2O
    30s

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