Question 1

What is correct name of the compound whose formula is BF3?

Accepted Answer

A)  boron trifluoride
B)  boron fluoride
C)  monoboron trifluorine
D)  boron(III) fluoride
E)  none of the above

Question 2

How many carbon atoms are in the formula Al2(CO3) 3?

Accepted Answer

A)  3
B)  9
C)  1
D)  6
E)  none of the above

Question 3

How many of each type of atoms are there in the formula NH4C2H3O2?

Accepted Answer

A)  N = 4,H = 7,C = 2,O = 2
B)  N = 1,H = 4,C = 2,O = 2
C)  N = 1,H = 3,C = 2,O = 2
D)  N = 1,H = 7,C = 2,O = 2
E)  none of the above

Question 4

The ionic compound MgO is named manganese oxide.

Accepted Answer

A) True 
 B)False

Question 5

What is the correct formula for a compound that has three oxygen atoms and one sulfur atom?

Accepted Answer

A)  O3S
B)  SO3
C)  3OS
D)  SO3
E)  none of the above

Question 6

Carbon dioxide is an example of a molecular compound.

Accepted Answer

A) True 
 B)False

Question 7

What is the formula mass of sulfurous acid?

Accepted Answer

A)  82.08 amu
B)  98.08 amu
C)  83.09 amu
D)  66.08 amu
E)  none of the above

Question 8

The phosphorous-to-hydrogen mass ratio is 10.2 for a compound.This ratio could correspond to the compound:

Accepted Answer

A)  PH.
B)  PH2.
C)  PH3.
D)  PH6.
E)  none of the above

Question 9

Carbon is considered which of the following?

Accepted Answer

A)  atomic element
B)  molecular element
C)  molecular compound
D)  ionic compound
E)  none of the above

Question 10

The formula for potassium chlorate is KClO3.The formula for magnesium chloride is MgCl2.What is the formula for magnesium chlorate?

Accepted Answer

A)  MgClO3
B)  Mg2ClO3
C)  Mg(ClO3) 2
D)  Mg2(ClO3) 3
E)  none of the above

Question 11

If an oxyacid contains the sulfate oxyanion,then this acid has the name sulfurous acid.

Accepted Answer

A) True 
 B)False

Question 12

What is the formula for an ionic compound made of magnesium and sulfur?

Accepted Answer

A)  MgS
B)  MgS2
C)  Mg2S
D)  Mg2S3
E)  none of the above

Question 13

What is the name of the ionic compound made of beryllium and chlorine?

Accepted Answer

A)  beryllium(II) chloride
B)  beryllium dichloride
C)  beryllium chloride
D)  monoberyllium dichloride
E)  none of the above

Question 14

Suppose an unknown compound XY has an X-to-Y mass ratio of 4.0.If decomposition of compound XY gives 12.0 grams of X,then how many grams of Y must form?

Accepted Answer

A)  48.0 grams
B)  12.0 grams
C)  4.0 grams
D)  3.0 grams
E)  none of the above

Question 15

The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound.

Accepted Answer

A) True 
 B)False

Question 16

What is the name of HIO3?

Accepted Answer

A)  iodic acid
B)  hydroioidic acid
C)  hydroiodous acid
D)  iodous acid
E)  none of the above

Question 17

Fluorine is considered which of the following?

Accepted Answer

A)  atomic element
B)  molecular element
C)  molecular compound
D)  ionic compound
E)  none of the above

Question 18

What is the proper name for HBr (aq) ?

Accepted Answer

A)  hydrobromous acid
B)  hydrousbromic acid
C)  hydrobromic acid
D)  bromous acid
E)  none of the above

Question 19

Which of the following compounds have the smallest formula mass?

Accepted Answer

A)  CO2
B)  SO2
C)  NO2
D)  SiO2
E)  H2O

Question 20

The proper name for the acid HF is hydrofluoric acid.

Accepted Answer

A) True 
 B)False

Exam 5: Molecules and Compounds

How many of each type of atoms are there in the formula NH4C2H3O2?

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What is the name of the ionic compound made of beryllium and chlorine?

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Carbon dioxide is an example of a molecular compound.

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The formula for potassium chlorate is KClO3.The formula for magnesium chloride is MgCl2.What is the formula for magnesium chlorate?

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How many carbon atoms are in the formula Al2(CO3) 3?

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The phosphorous-to-hydrogen mass ratio is 10.2 for a compound.This ratio could correspond to the compound:

Correct AnswerverifiedShow Answer

What is correct name of the compound whose formula is BF3?

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The proper name for the acid HF is hydrofluoric acid.

Correct AnswerverifiedShow Answer

The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound.

Correct AnswerverifiedShow Answer

Fluorine is considered which of the following?

Correct AnswerverifiedShow Answer

What is the formula for an ionic compound made of magnesium and sulfur?

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What is the formula mass of sulfurous acid?

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If an oxyacid contains the sulfate oxyanion,then this acid has the name sulfurous acid.

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What is the name of HIO3?

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Suppose an unknown compound XY has an X-to-Y mass ratio of 4.0.If decomposition of compound XY gives 12.0 grams of X,then how many grams of Y must form?

Correct AnswerverifiedShow Answer

What is the correct formula for a compound that has three oxygen atoms and one sulfur atom?

Correct AnswerverifiedShow Answer

Which of the following compounds have the smallest formula mass?

Correct AnswerverifiedShow Answer

The ionic compound MgO is named manganese oxide.

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What is the proper name for HBr (aq) ?

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Carbon is considered which of the following?

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How many of each type of atoms are there in the formula NH₄C₂H₃O₂?

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The formula for potassium chlorate is KClO₃.The formula for magnesium chloride is MgCl₂.What is the formula for magnesium chlorate?

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How many carbon atoms are in the formula Al₂(CO₃) ₃?

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What is correct name of the compound whose formula is BF₃?

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What is the name of HIO₃^?

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