CHM 1040: Final 2/4

  1. Ammonium nitrate can be synthesized by the reaction of ammonia and nitric acid. What is the chemical equation for this reaction?




    C) NH3 + HNO3 --? NH4NO3
  2. Copper dissolves in nitric acid solution to give aqueous
    copper sulfate, nitrogen monoxide gas, and water. Indicate the
    (unbalanced) chemical equation for this reaction.




    D) Cu (s) + HNO3 (aq) --? Cu(NO3)2(aq) + NO (g) + H2O (l)
  3. Ionic compounds form




    D) mostly between metals and non-metals.

    The metal gives electrons to a non-metal
  4. In a chemical reaction:





    E) reactants are converted to products.
  5. Evidence of chemical reactions is always obvious.

    A) True
    B) False
    B) False

    An observer may be looking for the wrong thing, or in the wrong place (though our examples will generally be obvious)
  6. Dalton's
    atomic theory was eventually successful because it _____ observations
    that were made later, and _______ previous theories.




    C) predicted ... explained
  7. What are the coefficients when the following reaction is properly balanced?___O2 (g) + ___CH4 (g) --? ___CO2 (g) + ___H2O (g)





    E) 2 1 1 2
  8. Sodium-23




    D) is chemically identical to sodium-22.

    As long as Z is the same, they are the same chemical element
  9. Give the formula of the compound formed from aluminum and oxygen.





    C) Al2O3
  10. What is the name of the compound PF5?




    B) phosphorus pentafluoride
  11. What is the proper name of the compound formed between aluminum and oxygen?





    C) aluminum oxide
  12. Which of the following is not a part of Dalton's atomic theory?





    A) Natural materials are combinations of elements.
  13. After a chemical reaction is properly balanced, the coefficients should be ————.





    B) reduced to the smallest set of integers and must give the same number of atoms of each element on both sides of the equation
  14. Which of the following is the formula for periodate?





    E) IO4-
  15. What is the correct name for the compound Na2O?





    B) sodium peroxide
  16. In a chemical reaction,





    E) the reactants form the products of the reaction.
  17. Identify the false statement regarding the periodic table:





    B) The periodic table arranges families of elements horizontally.

    Families of elements are arranged vertically.
  18. Hydrogen peroxide liquid decomposes to form water and oxygen gas. Identify the (unbalanced) chemical reaction.




    D) H2O2 --? H2O + O2
  19. Which set of statements regarding the nuclear atom is correct?




    D) mp ? mn, charges: p+, e-, n0
  20. For a given compound, the subscripts in the chemical formula may not change.

    A) True
    B) False
    A) True

    Changing the subscripts changes the compound identity. The law of constant composition tells us this
  21. Which of the following is sulfurous acid?

    A) HNO3
    B) H2SO3
    C) H2SO4
    D) H2S
    E) H2S2O3
    B) H2SO3
  22. The largest single category or grouping of elements in the periodic table is the:





    C) metals.
  23. A typical oxoacid contains oxygen, hydrogen and a(n):




    C) non-metal.
  24. Give the formula of the compound formed from potassium and iodine.





    D) KI
  25. When magnesium is dissolved in nitric acid, hydrogen gas is
    evolved, and aqueous magnesium nitrate is formed. Indicate the
    (unbalanced) chemical reaction.




    C) Mg (s) + HNO3 (aq) --? H2(g) + Mg(NO3)2 (aq)
  26. Which of the following is the formula for acetic acid?





    B) HC2H3O2
  27. Trace elements





    B) are present in the body in tiny amounts.
  28. Give the proper name for HI.





    D) hydroiodic acid
  29. Ions




    A) are formed through the gain and loss of electrons.
  30. Give the proper formula for potassium sulfate.





    B) K2SO
  31. Which of the following is not a physical state that may be specified in a chemical equation?





    D) (vap)
  32. A compound that has four atoms of hydrogen, two of oxygen, and two of carbon might be




    A) HC2H3O2
  33. Balance the following equation representing the Hall process &; an important synthesis of aluminum.___Al2O3 (s) + ___C(s) --? ____Al(s) + ___CO2 (g)




    B) 2 3 4 3
  34. What are the coefficients when the following reaction is properly balanced?___silicon tetraiodide + ___magnesium —? ___silicon + ___magnesium iodide





    B) 1 2 1 2
  35. What is the chemical formula of dichloropentoxide?






    B) Cl2O5
  36. What is the correct formula for the compound copper(II) chloride?




    B) CuCl2
  37. Which statement regarding isotopic symbols is correct?





    D) The mass number is larger than Z.

    A equals Z + the number of neutrons.
  38. Give the formula for the compound rubidium hydroxide.





    D) RbOH
  39. What is the proper name for the compound Co2O3?




    A) cobalt(III) oxide
  40. Which of the following is not evidence of a chemical reaction?





    C) boiling water

    (Although the heat used to boil the water may be produced by a chemical reaction.)
  41. What are the coefficients when the following reaction is
    properly balanced?___Iron(II) oxide + ___carbon —? ___iron + ___carbon
    dioxide gas





    A) 2 1 2 1
  42. Ionic compounds




    A) form to give an overall neutral charge.

    The overall charge on an ionic compound must be zero
  43. Titanium (IV) bromide reacts with hydrogen gas to produce titanium metal and hydrogen bromide gas. Which is the correct balanced equation for this reaction?




    D) TiBr4 (aq) + 2H2 (g) --? Ti (s) + 4HBr (g)
  44. The elemental symbol for potassium is





    C) K
  45. What is wrong with the compound KrO2?





    B) Krypton does not form compounds.

    Noble gases are mostly unreactive
  46. Ernest Rutherford





    C) theorized the nuclear atom.
  47. Atoms are mostly empty space.

    A) True
    B) False
    A) True

    The mass is centered at the very small nucleus. The electrons take up most of the space.
  48. What is the formula for the compound sulfur dioxide?

    A) SO2
    B) SO
    C) S2O
    D) S2O2
    E) S2O3
    A) SO2
  49. Solid sodium metal reacts explosively with chlorine gas yielding sodium chloride powder. Which is the correct balanced equation for this reaction?




    A) 2Na(s) + Cl2(g) --? 2NaCl(s)
  50. What are the coefficients when the following reaction is
    properly balanced?___ sodium carbonate +___sulfur + ___sulfur dioxide
    gas —? ___carbon dioxide gas + ___sodium thiosulfate




    C) 1 1 1 1 1
  51. Ethanol (C2H5OH) burns in oxygen to form carbon dioxide gas and water vapor. Identify the (unbalanced) chemical equation.




    B) C2H5OH + O2 --? CO2 + H2O
  52. The nuclear atom





    A) consists of a small, dense nucleus and electrons.

    The nucleus contains most of the mass
  53. Which family in the periodic table is found naturally as diatomic molecules?




    C) The halogens.
  54. Which is a correct chemical formula?




    C) H2S
  55. What are the coefficients when the following reaction is properly balanced?___Al (s) + ___H2SO4(aq) --? ___Al2(SO4)3 (aq) + ___H2(g)





    A) 2 3 1 3
  56. Which of the following is nitrite?





    E) N2O2
    B) NO2-
  57. Give the formula for the compound chromium(V) nitrate.






    E) CrO3)5
  58. Names from old languages determine some of the elemental symbols.

    A) True
    B) False
    A) True
  59. What are the coefficients when the following reaction is properly balanced?___NO (g) + ___Cl2 (g) --? ___NOCl (g)




    C) 2 1 2
Author
kieu
ID
82138
Card Set
CHM 1040: Final 2/4
Description
CHM 1040: Final 2/4
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