Question 1

Metals tend to _____ electrons and form ions with a _____ charge.

Accepted Answer

A)  lose; positive 
B)  lose; negative 
C)  gain; positive 
D)  gain; negative 
E)  lose; zero 
A)  lose; positive 
B)  lose; negative 
C)  gain; positive 
D)  gain; negative 
E)  lose; zero

Question 2

What is the coefficient of iron   oxide when the equation is balanced?
_____ Fe2O3 + _____ C  → _____ Fe + _____ CO2

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 3

In the following equation, what is the coefficient of HF   when the equation is balanced?
_____ B  2  O  3  + _____ HF → _____ BF  3  + _____ H  2  O

Accepted Answer

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

Question 4

Consider the reaction:  4 NH3 + 5 O2 → 6 H2O + 4 NO
If 125.0 g of NH3 reacts with 225.0 g of O2, how many grams of H2O will be present after a complete reaction?

Accepted Answer

A)  0 grams 
B)  151.9 grams 
C)  198.5 grams 
D)  350.0 grams 
E)  275.2 grams 
A)  0 grams 
B)  151.9 grams 
C)  198.5 grams 
D)  350.0 grams 
E)  275.2 grams

Question 5

Nonmetals tend to _____ electrons and form ions with a _____ charge.

Accepted Answer

A)  lose; positive 
B)  lose; negative 
C)  gain; positive 
D)  gain; negative 
E)  lose; zero 
A)  lose; positive 
B)  lose; negative 
C)  gain; positive 
D)  gain; negative 
E)  lose; zero

Question 6

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many monkeys can a zoo obtain in exchange for 10 camels?

Accepted Answer

A)  6 monkeys 
B)  12 monkeys 
C)  15 monkeys 
D)  24 monkeys 
E)  30 monkeys 
A)  6 monkeys 
B)  12 monkeys 
C)  15 monkeys 
D)  24 monkeys 
E)  30 monkeys

Question 7

Identify a true statement about the naming of binary molecular compounds.

Accepted Answer

A)  The less metallic element in the compound is written first. 
B)  The element with the higher atomic mass is written first. 
C)  The more metallic element in the compound is written first. 
D)  The element with the lower atomic mass is written first. 
E)  The element with the higher atomic number is written first. 
A)  The less metallic element in the compound is written first. 
B)  The element with the higher atomic mass is written first. 
C)  The more metallic element in the compound is written first. 
D)  The element with the lower atomic mass is written first. 
E)  The element with the higher atomic number is written first.

Question 8

Nicotine has the chemical formula C10H14N2. What is the formula mass of nicotine?

Accepted Answer

A)  26 amu 
B)  81 amu 
C)  138 amu 
D)  162 amu 
E)  366 amu 
A)  26 amu 
B)  81 amu 
C)  138 amu 
D)  162 amu 
E)  366 amu

Question 9

Which statement about ionic compounds is incorrect ?

Accepted Answer

A)  Ionic compounds include table salt, calcium carbonate, and sodium bicarbonate . 
B)  Ionic solids dissolved in water dissociate to form ions. 
C)  Ionic bonds are formed between metals and nonmetals. 
D)  Ionic bonds involve the sharing of electrons by metals and nonmetals. 
E)  Ionic compounds are held together by the attraction between positive and negative ions. 
A)  Ionic compounds include table salt, calcium carbonate, and sodium bicarbonate . 
B)  Ionic solids dissolved in water dissociate to form ions. 
C)  Ionic bonds are formed between metals and nonmetals. 
D)  Ionic bonds involve the sharing of electrons by metals and nonmetals. 
E)  Ionic compounds are held together by the attraction between positive and negative ions.

Question 10

In the following equation, what is the coefficient of oxygen (O  2  )   when the equation is balanced?
_____ C  3  H  8  + _____ O  2  → _____ CO  2  + _____ H  2  O

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  10 
A)  2 
B)  3 
C)  4 
D)  5 
E)  10

Question 11

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many flamingos can a zoo obtain in exchange for 6 rhinos?

Accepted Answer

A)  10 flamingos 
B)  30 flamingos 
C)  50 flamingos 
D)  120 flamingos 
E)  160 flamingos 
A)  10 flamingos 
B)  30 flamingos 
C)  50 flamingos 
D)  120 flamingos 
E)  160 flamingos

Question 12

Which of these is the correct name for MgCl2?

Accepted Answer

A)  Magnesium chloride 
B)  Magnesium chlorine 
C)  Magnesium dichloride 
D)  Magnesium monochloride 
E)  Monomagnesium monochloride 
A)  Magnesium chloride 
B)  Magnesium chlorine 
C)  Magnesium dichloride 
D)  Magnesium monochloride 
E)  Monomagnesium monochloride

Question 13

How many moles of potassium cyanide are present in a 113.5-gram sample of KCN?

Accepted Answer

A)  3.487 moles 
B)  2.903 moles 
C)  1.743 moles 
D)  0.872 moles 
E)  0.0173 moles 
A)  3.487 moles 
B)  2.903 moles 
C)  1.743 moles 
D)  0.872 moles 
E)  0.0173 moles

Question 14

When properly balanced, what are the correct coefficients for the reaction H2 + O2 → H2O?

Accepted Answer

A)  1, 1, 1 
B)  1, 1/2, 1 
C)  1, 2, 1 
D)  2, 1, 2 
E)  10, 5, 10 
A)  1, 1, 1 
B)  1, 1/2, 1 
C)  1, 2, 1 
D)  2, 1, 2 
E)  10, 5, 10

Question 15

The correct formula for a sulfate ion is _____.

Accepted Answer

A)  SO3 −  
B)  SO3 2−  
C)  SO4 −  
D)  SO4 2−  
E)  S O  −  
A)  SO3 −  
B)  SO3 2−  
C)  SO4 −  
D)  SO4 2−  
E)  S O  −

Question 16

How many atoms of aluminum are contained in a 36.0-ounce aluminum bat? (1 ounce = 28.35 grams)

Accepted Answer

A)  2.28 × 1025 
B)  6.28 × 10 − 23 
C)  6.15 × 1026 
D)  6.33 × 1023 
E)  Insufficient data 
A)  2.28 × 1025 
B)  6.28 × 10 − 23 
C)  6.15 × 1026 
D)  6.33 × 1023 
E)  Insufficient data

Question 17

The correct formula for a nitrate ion is  _____.

Accepted Answer

A)  NO −  
B)  NO3 +  
C)  NO3 −  
D)  NO3 2−  
E)  NO 2 −  
A)  NO −  
B)  NO3 +  
C)  NO3 −  
D)  NO3 2−  
E)  NO 2 −

Question 18

For an ionic compound, X  2  Y  5  , if the charge on each Y ion is − 2, the charge on each X ion is _____.

Accepted Answer

A)  − 2 
B)  − 5 
C)  − 10 
D)  +10 
E)  +5 
A)  − 2 
B)  − 5 
C)  − 10 
D)  +10 
E)  +5

Question 19

Which of these is the correct chemical formula for carbon tetrachloride?

Accepted Answer

A)  CClS1U1B13S1U1B0 
B)  CClS1U1B14S1U1B0 
C)  CClS1U1B15S1U1B0 
D)  CS1U1B14S1U1B0Cl 
E)  CS1U1B14S1U1B0 ClS1U1B14S1U1B0 
A)  CClS1U1B13S1U1B0 
B)  CClS1U1B14S1U1B0 
C)  CClS1U1B15S1U1B0 
D)  CS1U1B14S1U1B0Cl 
E)  CS1U1B14S1U1B0 ClS1U1B14S1U1B0

Question 20

Consider  the reaction: 4 NH3 + 5 O2 → 6 H2O + 4 NO
If 2.5 moles of NH3 react with 3.0 moles of O2, what is the limiting reagent?

Accepted Answer

A)  NH3 
B)  O2 
C)  H2O 
D)  NO 
E)  None of these 
A)  NH3 
B)  O2 
C)  H2O 
D)  NO 
E)  None of these

Metals tend to _ electrons and form ions with a _ charge.

What is the coefficient of iron oxide when the equation is balanced? ___ Fe₂O₃ + _ C → _ Fe + ___ CO₂

In the following equation, what is the coefficient of HF when the equation is balanced? ___ B ₂ O ₃ + _ HF → _ BF ₃ + ___ H ₂ O

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, how many grams of H₂O will be present after a complete reaction?

Nonmetals tend to _ electrons and form ions with a _ charge.

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many monkeys can a zoo obtain in exchange for 10 camels?

Identify a true statement about the naming of binary molecular compounds.

Nicotine has the chemical formula C₁₀H₁₄N₂. What is the formula mass of nicotine?

Which statement about ionic compounds is incorrect ?

In the following equation, what is the coefficient of oxygen (O ₂ ) when the equation is balanced? ___ C ₃ H ₈ + _ O ₂ → _ CO ₂ + ___ H ₂ O

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many flamingos can a zoo obtain in exchange for 6 rhinos?

Which of these is the correct name for MgCl₂?

How many moles of potassium cyanide are present in a 113.5-gram sample of KCN?

When properly balanced, what are the correct coefficients for the reaction H₂ + O₂ → H₂O?

The correct formula for a sulfate ion is _____.

How many atoms of aluminum are contained in a 36.0-ounce aluminum bat? (1 ounce = 28.35 grams)

The correct formula for a nitrate ion is _____.

For an ionic compound, X ₂ Y ₅ , if the charge on each Y ion is − 2, the charge on each X ion is _____.

Which of these is the correct chemical formula for carbon tetrachloride?

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 2.5 moles of NH₃ react with 3.0 moles of O₂, what is the limiting reagent?

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Exam 4: Molecules, Compounds, and Chemical Reactions

Metals tend to _____ electrons and form ions with a _____ charge.

What is the coefficient of iron oxide when the equation is balanced? _____ Fe2O3 + _____ C → _____ Fe + _____ CO2

In the following equation, what is the coefficient of HF when the equation is balanced? _____ B 2 O 3 + _____ HF → _____ BF 3 + _____ H 2 O

Consider the reaction: 4 NH3 + 5 O2 → 6 H2O + 4 NO If 125.0 g of NH3 reacts with 225.0 g of O2, how many grams of H2O will be present after a complete reaction?

Nonmetals tend to _____ electrons and form ions with a _____ charge.

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many monkeys can a zoo obtain in exchange for 10 camels?

Identify a true statement about the naming of binary molecular compounds.

Nicotine has the chemical formula C10H14N2. What is the formula mass of nicotine?

Which statement about ionic compounds is incorrect ?

In the following equation, what is the coefficient of oxygen (O 2 ) when the equation is balanced? _____ C 3 H 8 + _____ O 2 → _____ CO 2 + _____ H 2 O

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many flamingos can a zoo obtain in exchange for 6 rhinos?

Which of these is the correct name for MgCl2?

How many moles of potassium cyanide are present in a 113.5-gram sample of KCN?

When properly balanced, what are the correct coefficients for the reaction H2 + O2 → H2O?

The correct formula for a sulfate ion is _____.

How many atoms of aluminum are contained in a 36.0-ounce aluminum bat? (1 ounce = 28.35 grams)

The correct formula for a nitrate ion is _____.

For an ionic compound, X 2 Y 5 , if the charge on each Y ion is − 2, the charge on each X ion is _____.

Which of these is the correct chemical formula for carbon tetrachloride?

Consider the reaction: 4 NH3 + 5 O2 → 6 H2O + 4 NO If 2.5 moles of NH3 react with 3.0 moles of O2, what is the limiting reagent?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

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The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology Online Only

Filters

Metals tend to _ electrons and form ions with a _ charge.

What is the coefficient of iron oxide when the equation is balanced? ___ Fe₂O₃ + _ C → _ Fe + ___ CO₂

In the following equation, what is the coefficient of HF when the equation is balanced? ___ B ₂ O ₃ + _ HF → _ BF ₃ + ___ H ₂ O

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 125.0 g of NH₃ reacts with 225.0 g of O₂, how many grams of H₂O will be present after a complete reaction?

Nonmetals tend to _ electrons and form ions with a _ charge.

Nicotine has the chemical formula C₁₀H₁₄N₂. What is the formula mass of nicotine?

In the following equation, what is the coefficient of oxygen (O ₂ ) when the equation is balanced? ___ C ₃ H ₈ + _ O ₂ → _ CO ₂ + ___ H ₂ O

Which of these is the correct name for MgCl₂?

When properly balanced, what are the correct coefficients for the reaction H₂ + O₂ → H₂O?

For an ionic compound, X ₂ Y ₅ , if the charge on each Y ion is − 2, the charge on each X ion is _____.

Consider the reaction: 4 NH₃ + 5 O₂ → 6 H₂O + 4 NO If 2.5 moles of NH₃ react with 3.0 moles of O₂, what is the limiting reagent?