Question 1

What is the name of the compound, HCN(g) ?

Accepted Answer

A)  hydrocarbonitride
B)  hydrocyanic acid
C)  hydrogen carbonitride
D)  hydrogen cyanate
E)  hydrogen cyanideF) B) and D)
G) A) and C)

Question 2

The symbol Te belongs to a metalloid in group ________.

Accepted Answer

The answer of The symbol Te belongs to a metalloid...

Question 3

What is the name for the compound V2O5?

Accepted Answer

A)  divanadium pentoxide
B)  vanadic oxide
C)  vanadium(V) oxide
D)  vanadium(V) pentoxide
E)  vanadous oxideF) B) and E)
G) C) and D)

Question 4

Diamond and graphite are different forms of which element?

Accepted Answer

A)  sodium
B)  carbon
C)  mercury
D)  gold
E)  calciumF) A) and B)
G) A) and C)

Question 5

Which of these elements has the most similar chemical properties to magnesium?

Accepted Answer

A)  calcium
B)  sodium
C)  aluminum
D)  iron
E)  cesiumF) B) and E)
G) B) and C)

Question 6

Which compound exists as a diatomic molecule in its free state?

Accepted Answer

A)  magnesium
B)  manganese
C)  silicon
D)  arsenic
E)  chlorineF) A) and B)
G) A) and E)

Question 7

What is the best name for the I2O5 molecule?

Accepted Answer

A)  diiodine pentoxide
B)  iodine pentoxygen
C)  pentoxygen iodide
D)  iodine dioxide
E)  diiodide oxideF) A) and C)
G) D) and E)

Question 8

Which group of nonmetallic elements is called "inert"?

Accepted Answer

The answer of Which group of nonmetallic elements is called...

Question 9

Write the formula of the alkane hydrocarbon with seven carbon atoms.

Accepted Answer

The answer of Write the formula of the alkane hydrocarbon...

Question 10

Select the examples in which the formulas do not correctly match the names of the compounds indicated.  Hint: Write the correct name of each formula without looking at the names and then compare it to the choices.

Accepted Answer

A)  II only
B)  II and III
C)  I, II and IV
D)  I and IV
E)  II, III and IVF) B) and E)
G) B) and C)

Question 11

Which of these elements has the most similar chemical properties to sulfur?

Accepted Answer

A)  calcium
B)  oxygen
C)  phosphorus
D)  bromine
E)  nitrogenF) B) and E)
G) A) and B)

Question 12

Write the formula for the compound that has the atoms and, or groups in the order given: 3 Fe, and two groups made up of 1 As and 4 O. Hint: The groups of atoms are polyatomic ions.

Accepted Answer

The answer of Write the formula for the compound that...

Question 13

What is the formula of the compound formed from the calcium ion and HCO3-?

Accepted Answer

Question 14

The name of the compound Al(SO4) 3 is

Accepted Answer

A)  aluminum sulfide.
B)  aluminum sulfate.
C)  aluminum trisulfate.
D)  aluminum(III) sulfate.
E)  aluminum sulfite.F) All of the above
G) A) and D)

Question 15

The alkali metals like sodium and potassium are soft metals, so they are unreactive towards water.

Accepted Answer

A) True 
 B)False

Question 16

Which of these elements has the most similar chemical properties silicon?

Accepted Answer

A)  aluminum
B)  phosphorus
C)  nitrogen
D)  silver
E)  germaniumF) B) and D)
G) D) and E)

Question 17

List the polyatomic ions, including the number of each type, present in the compound, (NH4) 3PO4. Hint: Think about the requirements for forming ionic compounds and how this affects the number of each ion present in the formula.

Accepted Answer

A)  4N3-, 12H+, PO42-
B)  3NH4+, 4PO43-
C)  N3-, 12H+, P3- ; 4O2-
D)  3NH4+, PO43-
E)  4NH+, 3PO43-F) A) and D)
G) C) and E)

Question 18

The formula for magnesium phosphide is Mg3P2.

Accepted Answer

A) True 
 B)False

Question 19

Which compound is correctly represented as a hydrate?

Accepted Answer

A)  C2H5OH2+
B)  MgSO4·7H2O
C)  FeH2(CO) 4
D)  O2S(OH) 2
E)  [CrCl(H2O) 5]ClF) A) and B)
G) All of the above

Question 20

How many atoms of each element appear on each side of the arrow in the following chemical equation? 3Cl3BNH2CH3 + 6(CH3) 3N  →\rarr→ 6(CH3) 3NHCl + B3N3Cl3(CH3) 3 Hint: Distribute coefficients across the entire compound for each reactant and product. Be sure to account for parenthesis.

Accepted Answer

A)  9Cl, 3B, 9N, 54H, 6C
B)  9Cl, 3B, 9N, 69H, 21C
C)  3Cl, 3B, 9N, 15H, 21C
D)  9Cl, 1B, 9N, 54H, 9C
E)  3Cl, 3B, 9N, 69H, 18C F) A) and B)
G) A) and C)

Exam 3: Elements, Compounds, and the Periodic Table

List the polyatomic ions, including the number of each type, present in the compound, (NH₄) ₃PO₄. Hint: Think about the requirements for forming ionic compounds and how this affects the number of each ion present in the formula.

Correct Answer
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Select the examples in which the formulas do not correctly match the names of the compounds indicated. Hint: Write the correct name of each formula without looking at the names and then compare it to the choices.

Correct Answer
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What is the formula of the compound formed from the calcium ion and HCO₃^-?

Correct Answer
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Diamond and graphite are different forms of which element?

Correct Answer
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Write the formula of the alkane hydrocarbon with seven carbon atoms.

Correct Answer
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The symbol Te belongs to a metalloid in group ________.

Correct Answer
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Write the formula for the compound that has the atoms and, or groups in the order given: 3 Fe, and two groups made up of 1 As and 4 O. Hint: The groups of atoms are polyatomic ions.

Correct Answer
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What is the name of the compound, HCN(g) ?

Correct Answer
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What is the best name for the I₂O₅ molecule?

Correct Answer
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The formula for magnesium phosphide is Mg₃P₂.

Correct Answer
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Correct Answer
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The name of the compound Al(SO₄) ₃ is

Correct Answer
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Which of these elements has the most similar chemical properties to sulfur?

Correct Answer
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The alkali metals like sodium and potassium are soft metals, so they are unreactive towards water.

Correct Answer
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Which of these elements has the most similar chemical properties silicon?

Correct Answer
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Which compound is correctly represented as a hydrate?

Correct Answer
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Which group of nonmetallic elements is called "inert"?

Correct Answer
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Which of these elements has the most similar chemical properties to magnesium?

Correct Answer
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Which compound exists as a diatomic molecule in its free state?

Correct Answer
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What is the name for the compound V₂O₅?

Correct Answer
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Exam 3: Elements, Compounds, and the Periodic Table

List the polyatomic ions, including the number of each type, present in the compound, (NH4) 3PO4. Hint: Think about the requirements for forming ionic compounds and how this affects the number of each ion present in the formula.

Correct AnswerverifiedShow Answer

Select the examples in which the formulas do not correctly match the names of the compounds indicated. Hint: Write the correct name of each formula without looking at the names and then compare it to the choices.

Correct AnswerverifiedShow Answer

What is the formula of the compound formed from the calcium ion and HCO3-?

Correct AnswerverifiedShow Answer

Diamond and graphite are different forms of which element?

Correct AnswerverifiedShow Answer

Write the formula of the alkane hydrocarbon with seven carbon atoms.

Correct AnswerverifiedShow Answer

The symbol Te belongs to a metalloid in group ________.

Correct AnswerverifiedShow Answer

Write the formula for the compound that has the atoms and, or groups in the order given: 3 Fe, and two groups made up of 1 As and 4 O. Hint: The groups of atoms are polyatomic ions.

Correct AnswerverifiedShow Answer

What is the name of the compound, HCN(g) ?

Correct AnswerverifiedShow Answer

What is the best name for the I2O5 molecule?

Correct AnswerverifiedShow Answer

The formula for magnesium phosphide is Mg3P2.

Correct AnswerverifiedShow Answer

How many atoms of each element appear on each side of the arrow in the following chemical equation? 3Cl3BNH2CH3 + 6(CH3) 3N →\rarr→ 6(CH3) 3NHCl + B3N3Cl3(CH3) 3 Hint: Distribute coefficients across the entire compound for each reactant and product. Be sure to account for parenthesis.

Correct AnswerverifiedShow Answer

The name of the compound Al(SO4) 3 is

Correct AnswerverifiedShow Answer

Which of these elements has the most similar chemical properties to sulfur?

Correct AnswerverifiedShow Answer

The alkali metals like sodium and potassium are soft metals, so they are unreactive towards water.

Correct AnswerverifiedShow Answer

Which of these elements has the most similar chemical properties silicon?

Correct AnswerverifiedShow Answer

Which compound is correctly represented as a hydrate?

Correct AnswerverifiedShow Answer

Which group of nonmetallic elements is called "inert"?

Correct AnswerverifiedShow Answer

Which of these elements has the most similar chemical properties to magnesium?

Correct AnswerverifiedShow Answer

Which compound exists as a diatomic molecule in its free state?

Correct AnswerverifiedShow Answer

What is the name for the compound V2O5?

Correct AnswerverifiedShow Answer

List the polyatomic ions, including the number of each type, present in the compound, (NH₄) ₃PO₄. Hint: Think about the requirements for forming ionic compounds and how this affects the number of each ion present in the formula.

Correct Answer
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Correct Answer
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What is the formula of the compound formed from the calcium ion and HCO₃^-?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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What is the best name for the I₂O₅ molecule?

Correct Answer
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The formula for magnesium phosphide is Mg₃P₂.

Correct Answer
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Correct Answer
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The name of the compound Al(SO₄) ₃ is

Correct Answer
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Correct Answer
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What is the name for the compound V₂O₅?

Correct Answer
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