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The formula C9H20 is an empirical formula.

A) True
B) False

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Which one of the following formulas of ionic compounds is the least likely to be correct?


A) NH 4Cl
B) Ba(OH) 2
C) Na 2SO 4
D) Ca 2NO 3
E) Cu(CN) 2

F) D) and E)
G) A) and E)

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Silver chloride is used in photographic emulsions. What is its formula?


A) Ag 2Cl 3
B) Ag 2Cl
C) AgCl 3
D) AgCl 2
E) AgCl

F) A) and B)
G) C) and E)

Correct Answer

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One amu is defined as


A) the mass of a proton.
B) 1/12 the mass of an atom of One amu is defined as A) the mass of a proton. B) 1/12 the mass of an atom of . C) the mass of an atom of . D) 1/20 the mass of an atom of . E) 1/16 the mass of an atom of . .
C) the mass of an atom of One amu is defined as A) the mass of a proton. B) 1/12 the mass of an atom of . C) the mass of an atom of . D) 1/20 the mass of an atom of . E) 1/16 the mass of an atom of . .
D) 1/20 the mass of an atom of One amu is defined as A) the mass of a proton. B) 1/12 the mass of an atom of . C) the mass of an atom of . D) 1/20 the mass of an atom of . E) 1/16 the mass of an atom of . .
E) 1/16 the mass of an atom of One amu is defined as A) the mass of a proton. B) 1/12 the mass of an atom of . C) the mass of an atom of . D) 1/20 the mass of an atom of . E) 1/16 the mass of an atom of . .

F) A) and D)
G) A) and C)

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In nature, some elements exist as molecules, while others do not.

A) True
B) False

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The name for HF(g) is


A) Hydrofluoric acid.
B) Hydrogen(I) fluoride.
C) Hydrogen fluoride.
D) Hydrogen fluorine.
E) Fluoric acid.

F) None of the above
G) B) and C)

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Iron (III) chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?


A) Fe(Cl·6H2O) 3
B) Fe 3Cl·6H 2O
C) FeCl 3(H 2O) 6
D) Fe 3Cl(H 2O) 6
E) FeCl 3·6H 2O

F) A) and E)
G) A) and D)

Correct Answer

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What is the name of Na2O?


A) Disodium monoxide
B) Sodium monoxide
C) Sodium dioxide
D) Sodium(I) oxide
E) Sodium oxide

F) A) and B)
G) D) and E)

Correct Answer

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In the modern periodic table, the order in which the elements are placed is based on


A) atomic mass.
B) mass number.
C) atomic number.
D) atomic size.
E) chemical reactivity.

F) A) and B)
G) D) and E)

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Barium fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula and bonding for barium fluoride?


A) BaF 2, ionic compound
B) BaF 2, covalent compound
C) BaF, ionic compound
D) BaF, covalent compound
E) Ba 2F, ionic compound

F) B) and C)
G) A) and B)

Correct Answer

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The molecular formula of a compound provides more information than its structural formula.

A) True
B) False

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Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?


A) NaO, ionic compound
B) NaO, covalent compound
C) Na 2O, ionic compound
D) Na 2O, covalent compound
E) Na 2O 2, ionic compound

F) C) and D)
G) A) and E)

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What is the name of IF7?


A) Iodine fluoride
B) Iodic fluoride
C) Iodine heptafluoride
D) Heptafluoroiodide
E) Heptafluorine iodide

F) A) and D)
G) None of the above

Correct Answer

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Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain. What is its formula?


A) ZnAc 2
B) ZnCH 3COO
C) Zn(CH 3COO) 2
D) Zn 2CH 3COO
E) ZnCH 3COCH 3

F) B) and D)
G) A) and B)

Correct Answer

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Determine the molecular mass of iron (III) bromide hexahydrate, a substance used as a catalyst in organic reactions.


A) 403.65 amu
B) 355.54 amu
C) 317.61 amu
D) 313.57 amu
E) 295.56 amu

F) C) and E)
G) A) and C)

Correct Answer

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What is the formula for lithium nitrite?


A) LiNO 2
B) Li 2NO 2
C) LiNO 3
D) Li 2NO 3
E) LiNO 4

F) A) and B)
G) A) and E)

Correct Answer

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Which one of the following combinations of names and formulas of ions is incorrect?


A) O 2 − oxide
B) Al 3+ aluminum
C) NO 3 − nitrate
D) PO 4 3− phosphate
E) CrO 4 2− chromate

F) A) and B)
G) A) and C)

Correct Answer

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Iodine pentafluoride reacts slowly with glass and violently with water. Determine its molecular mass.


A) 653.52 amu
B) 259.89 amu
C) 221.90 amu
D) 202.90 amu
E) 145.90 amu

F) None of the above
G) A) and E)

Correct Answer

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Ionic compounds may carry a net positive or negative charge.

A) True
B) False

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Copper (Cu) is a transition metal.

A) True
B) False

Correct Answer

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Showing 61 - 80 of 101

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