CHM 1040: Final 2/4

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

A) NH₄NO₃ --? NH₃ + HNO₃
B) N₂ + HN --? HN₃
C) NH3 + HNO3 --? NH4NO3
D) KNO₃ + NH₃ --? N₂H₃O₂ + KO

Copper dissolves in nitric acid solution to give aqueous
copper sulfate, nitrogen monoxide gas, and water. Indicate the
(unbalanced) chemical equation for this reaction.

A) Cu (s) + SO2(g) + H2O(l) --? CuSO4 (aq) + H2SO4(aq)
B) Cu (s) + HNO3 (aq) --? Cu(NO3)2(aq) + NO (g) + H2O (l)
C) Cu (s) + H2S(aq) --? CuSO4 (aq) + SO2(g) + H2O (l)
D) Cu (s) + HCl (aq) --? CuSO4 (aq) + SO2 (g)

Ionic compounds form

A) mostly between non-metals.
B) mostly between metals.
C) mostly between metals and non-metals.
D) between any two metalloids.

In a chemical reaction:

A) products form reactants.
B) reactants are converted to products.
C) heat is always evolved.
D) the total number of atoms may change.
E) gases are usually formed.

Evidence of chemical reactions is always obvious.

A) True
B) False

Dalton's
atomic theory was eventually successful because it _____ observations
that were made later, and _______ previous theories.

A) predicted ... destroyed
B) experimented ... integrated
C) integrated ... ignored
D) predicted ... explained

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

A) 1 1 1 2
B) 3 2 2 3
C) 2 1 1 2
D) 4 1 1 2
E) 3/2 1 1 2

Sodium-23

A) has an atomic number of 22.
B) has a mass number of 34.
C) is chemically identical to neon-23.
D) is chemically identical to sodium-22.

Give the formula of the compound formed from aluminum and oxygen.

A) Al3O2
B) Al2O3
C) AlO
D) AlO2
E) Al2O

What is the name of the compound PF₅?
A) monophosphate
B) phosphorus fluorine
C) perphosphorus
D) monophosphate pentafluoride
E) phosphorus pentafluoride

What is the proper name of the compound formed between aluminum and oxygen?

A) aluminum oxide
B) dialuminum trioxide
C) aluminum dioxide
D) trialuminum oxide
E) dialuminum oxide

Which of the following is not a part of Dalton's atomic theory?

A) Atoms are indivisible in chemical reactions.
B) A given compound always has the same relative numbers and types of atoms.
C) Natural materials are combinations of elements.
D) All atoms of a given element are identical.
E) Atoms of elements combine to form compounds.

After a chemical reaction is properly balanced, the coefficients should be ————.

A) all less than 5
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
C) the same
D) fractions
E) different from each other

Which of the following is the formula for periodate?

A) IO-
B) IO3-
C) I-
D) IO4-
E) IO2-

What is the correct name for the compound Na2O?

A) sodium peroxide
B) persodium oxide
C) sodium oxide
D) disodium oxide
E) persodium dioxide

In a chemical reaction,

A) reactants and products must be in the same phase.
B) the reactants form the products of the reaction.
C) the atoms that are created are called the "reactants."
D) heat is produced
E) the atoms that are created are called the "products."

Identify the false statement regarding the periodic table:

A) The periodic table was first developed by Mendeleev.
B) The periodic table is predictive.
C) The periodic table arranges elements in families.
D) The periodic table is arranged according to Z.
E) The periodic table arranges families of elements horizontally.

Hydrogen peroxide liquid decomposes to form water and oxygen gas. Identify the (unbalanced) chemical reaction.

A) H2O2 --? H2O + O2
B) HO --? H2O + O2
C) H2O2 --? H2O + O
D) H2O --? H2O + O2

Which set of statements regarding the nuclear atom is correct?

A) m_p ? m_n, charges: p⁺, e^-, n⁰
B) m_p ? m_e, charges: p⁺, e^-, n⁰
C) m_n ? m_e, charges: p^-, e⁺, n⁰
D) m_p ? m_n, charges: p^-, e⁺, n⁰

For a given compound, the subscripts in the chemical formula may not change.

A) True
B) False

Which of the following is sulfurous acid?

A) HNO₃
B) H₂SO₃
C) H₂SO₄
D) H₂S
E) H₂S₂O₃

The largest single category or grouping of elements in the periodic table is the:

A) halogens.
B) noble gases.
C) non-metals.
D) alkaline earth metals.
E) metals.

A typical oxoacid contains oxygen, hydrogen and a(n):

A) metal.
B) metalloid.
C) non-metal.
D) polyatomic ion.

Give the formula of the compound formed from potassium and iodine.

A) PIO
B) K₂I
C) PI
D) PI₂
E) KI

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

A) Si(s) + HNO₃ (aq) --? H₂(g) + SiNO₃ (aq)
B) Mg (s) + HNO₃ (aq) --? H₂(s) + Mg(NO₃)₂ (s)
C) Si(s) + HNO₃ (aq) --? H₂(g) + Mg(NO₃)₂ (aq)
D) Mg (s) + HNO₃ (aq) --? H₂(g) + Mg(NO₃)₂ (aq)

Which of the following is the formula for acetic acid?

A) HCO
B) H₂AlO₃
C) H₂CO₃
D) HCN
E) HC₂H₃O₂

Trace elements

A) can be detected with Geiger counters.
B) have very small masses.
C) are dangerous.
D) are present in the body in tiny amounts.
E) are used only in medicine.

Give the proper name for HI.

A) hydrogen iodide
B) hydroiodic acid
C) monohydride iodide
D) iodoic acid
E) hydrochloric acid

Ions

A) are formed through the gain and loss of electrons.
B) cause fires when created.
C) only form from metals.
D) are not stable.

Give the proper formula for potassium sulfate.

A) PSO₃
B) K₂SO₃
C) K₂SO
D) P₂SO₄
E) KS₂

Which of the following is not a physical state that may be specified in a chemical equation?

A) (vap)
B) (g)
C) (l)
D) (s)
E) (aq)

A compound that has four atoms of hydrogen, two of oxygen, and two of carbon might be

A) CH₂O
B) C₄H₈O₄
C) C₂H₅O₃
D) HC₂H₃O₂

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

A) 2 2 4 3
B) 2 3 4 3
C) 1 3 1 3
D) 4 6 6 5

What are the coefficients when the following reaction is properly balanced?___silicon tetraiodide + ___magnesium —? ___silicon + ___magnesium iodide

A) 1 2 2 2
B) 1 1 1 1
C) 2 4 4 2
D) 1 2 1 2
E) 2 2 2 2

What is the chemical formula of dichloropentoxide?

A) Cl₂O₅
B) ClO₅
C) 2ClO₅
D) Cl₅O₂

What is the correct formula for the compound copper(II) chloride?

A) Cu₂Cl₂
B) CuCl₂
C) Cu₂Cl
D) CuCl

Which statement regarding isotopic symbols is correct?

A) The mass number is less than Z.
B) The mass number is larger than Z.
C) The atomic number is A.
D) The atomic number is larger than Z.
E) The number of protons is equal to A.

Give the formula for the compound rubidium hydroxide.

A) RbO₂
B) RO₂
C) RbOH
D) RbO
E) Rb(OH)₂

What is the proper name for the compound Co₂O₃?

A) tricobalt oxide
B) cobalt oxide
C) cobalt(II) oxide
D) cobalt(III) oxide

Which of the following is not evidence of a chemical reaction?

A) bubbling due to the formation of a gas
B) color change
C) boiling water
D) heat production
E) Insoluble solid formation

What are the coefficients when the following reaction is
properly balanced?___Iron(II) oxide + ___carbon —? ___iron + ___carbon
dioxide gas

A) 2 2 1 3
B) 4 2 4 2
C) 2 1 2 1
D) 4 1 1 2
E) 1/2 1 1 1

Ionic compounds

A) may be represented by different formulas.
B) form to give an overall neutral charge.
C) will not dissolve in water.
D) may have any net charge.

Titanium (IV) bromide reacts with hydrogen gas to produce titanium metal and hydrogen bromide gas. Which is the correct balanced equation for this reaction?

A) TiBr₂ (aq) + 2H₂ (g) --? 2Ti (s) + 2HBr (g)
B) TiBr₂ (aq) + H₂ (g) --? Ti (s) + 2HBr (g)
C) TiBr (aq) + H₂ (g) --? Ti (s) + H₂Br (g)
D) TiBr4 (aq) + 2H2 (g) --? Ti (s) + 4HBr (g)

The elemental symbol for potassium is

A) K
B) Ka
C) P
D) S
E) F

What is wrong with the compound KrO2?

A) Krypton does not form compounds.
B) Should be KrO4
C) Should be KrO
D) Krypton forms compounds with metals only.
E) Should be Kr2O

Ernest Rutherford

A) was responsible for the plum-pudding model.
B) opposed atomic theory.
C) proved the existence of the electron.
D) theorized the nuclear atom.
E) worked with Albert Einstein.

Atoms are mostly empty space.

A) True
B) False

What is the formula for the compound sulfur dioxide?

A) SO₂
B) SO
C) S₂O
D) S₂O₂
E) S₂O₃

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)
B) Na₂(s) + Cl₂(g) --? 2NaCl(s)
C) Na(s) + Cl(g) --? NaCl(s)
D) Na(s) + Cl₂(g) --? NaCl(s)

What are the coefficients when the following reaction is
properly balanced?___ sodium carbonate +___sulfur + ___sulfur dioxide
gas —? ___carbon dioxide gas + ___sodium thiosulfate

A) 1 2 1 2 2
B) 2 1 1 1 1
C) 1 1 1 1 1
D) 1 1 2 1 1

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

A) C₂H₅OH + H₂O --? O₂ + CO₂
B) C₂H₅OH + O₂ --? CO₂ + H₂O
C) C₂H₅OH --? CO₂ + H₂O
D) C₂H₅OH --? CO + H₂O

The nuclear atom

A) failed to predict observed behavior.
B) consists of a small, dense nucleus and electrons.
C) describes the nuclear chain reaction.
D) consists of a small, dense nucleus and protons.
E) has electrons centered at the nucleus.

Which family in the periodic table is found naturally as diatomic molecules?

A) The halogens.
B) The noble gases.
C) The transition metals.
D) The non-metals.

Which is a correct chemical formula?

A) HHHC₃
B) H_1.5O₃
C) H₂S
D) C_1/2O₄

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

A) 4 6 2 6
B) 1 3 1 3
C) 1 1 1 1
D) 2 2 3 2
E) 2 3 1 3

Which of the following is nitrite?

A) NO₂^-
B) N^3-
C) NO₃^-
D) NH₄⁺
E) N₂O₂

Give the formula for the compound chromium(V) nitrate.

A) Cr₅NO₃
B) 5CrNO₃
C) CrNO₃
D) CrO₃)₅
E) Cr₅NO₂

Names from old languages determine some of the elemental symbols.

A) True
B) False

What are the coefficients when the following reaction is properly balanced?___NO (g) + ___Cl2 (g) --? ___NOCl (g)

A) 1 2 3
B) 3 1 2
C) 1 1 2
D) 2 1 2