Question 1

Which of the following is a weak base?

Accepted Answer

A)  NH3 
B)  NaOH 
C)  KOH 
D)  Ca(OH)2 
A)  NH3 
B)  NaOH 
C)  KOH 
D)  Ca(OH)2

Question 2

When the equation Al + O2→ Al2O3 is balanced, the coefficient of Al is

Accepted Answer

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

Question 3

The number of moles of solute per liter of solution is called the ______________ of the solution.

Accepted Answer

The answer of The number of moles of solute per...

Question 4

When there is a net release of energy in a chemical reaction, it is called a(n) ______________ reaction.

Accepted Answer

A)  exothermic 
B)  activation 
C)  endothermic 
D)  combustion 
A)  exothermic 
B)  activation 
C)  endothermic 
D)  combustion

Question 5

State which element is oxidized and which is reduced in the reaction Al + 3F2 → 2AlF3.

Accepted Answer

Al is oxid

Question 6

​Balance the chemical equation: Bi2S3+ O2 → Bi2O3 + SO2

Accepted Answer

2Bi<sub>2</sub>S<sub

Question 7

When the equation Al + O2→ Al2O3 is balanced, the coefficient of O2 is

Accepted Answer

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

Question 8

Which acid is present in vinegar?

Accepted Answer

A)  HCl 
B)  H3PO4 
C)  H2SO4 
D)  HC2H3O2 
A)  HCl 
B)  H3PO4 
C)  H2SO4 
D)  HC2H3O2

Question 9

By definition, the removal of oxygen from a compound is called

Accepted Answer

A)  neutralization. 
B)  reduction. 
C)  oxidation. 
D)  displacement. 
A)  neutralization. 
B)  reduction. 
C)  oxidation. 
D)  displacement.

Question 10

In chemical equations, numbers placed before formulas are known as ______________.

Accepted Answer

The answer of In chemical equations, numbers placed before formulas...

Question 11

Each of the following general equations illustrates what basic type of chemical reaction?
a. AB + CD → AD + CB ______________
b. A + B → AB ______________
c. A + BC → AC + B ______________
d. AB → A + B ______________

Accepted Answer

a. double-replacemen

Question 12

How many molecules are in 1.00 mol of sulfur dioxide, SO2?

Accepted Answer

A)  64.1 
B)  64.1 × 6.02 × 1023 
C)  12.0 × 1023 
D)  6.02 × 1023 
A)  64.1 
B)  64.1 × 6.02 × 1023 
C)  12.0 × 1023 
D)  6.02 × 1023

Question 13

Which of the following is an example of a chemical property?

Accepted Answer

A)  Al has a density of 2.70 g/cm3. 
B)  Diamond is the hardest substance known. 
C)  Limestone will yield CO2 when heated. 
D)  CO2 will freeze at -78°C. 
A)  Al has a density of 2.70 g/cm3. 
B)  Diamond is the hardest substance known. 
C)  Limestone will yield CO2 when heated. 
D)  CO2 will freeze at -78°C.

Question 14

A reaction will occur when a piece of Mg is placed in aqueous Zn(NO3)2 if Mg is ______________ Zn in the activity series.

Accepted Answer

above, or

Question 15

The substances that are diminished in a chemical reaction are called the

Accepted Answer

A)  products. 
B)  reactants. 
C)  chemicals. 
D)  precipitates. 
A)  products. 
B)  reactants. 
C)  chemicals. 
D)  precipitates.

Question 16

Which type of reaction is 2Fe2O3+ 3C→ 4Fe+ 3CO2?

Accepted Answer

A)  Decomposition 
B)  Combination 
C)  Double-replacement 
D)  Single-replacement 
A)  Decomposition 
B)  Combination 
C)  Double-replacement 
D)  Single-replacement

Question 17

The substances formed in a chemical reaction are called the ______________.

Accepted Answer

The answer of The substances formed in a chemical reaction...

Question 18

In order, from top to bottom, in the activity series come K, Zn, Pb, H, Cu, and Au. Therefore,

Accepted Answer

A)  adding Pb to ZnCl2 will release Zn. 
B)  adding Cu to HCl will release hydrogen. 
C)  adding Au to HCl will release hydrogen. 
D)  adding Cu to AuCl3 will release Au. 
A)  adding Pb to ZnCl2 will release Zn. 
B)  adding Cu to HCl will release hydrogen. 
C)  adding Au to HCl will release hydrogen. 
D)  adding Cu to AuCl3 will release Au.

Question 19

Which one of the following is not a physical property of matter?

Accepted Answer

A)  Specific heat 
B)  Boiling point 
C)  Density 
D)  Flammability 
A)  Specific heat 
B)  Boiling point 
C)  Density 
D)  Flammability

Question 20

A solution with a pH of 8 is

Accepted Answer

A)  strongly acidic. 
B)  weakly basic. 
C)  strongly basic. 
D)  weakly acidic. 
A)  strongly acidic. 
B)  weakly basic. 
C)  strongly basic. 
D)  weakly acidic.

Exam 13: Chemical Reactions

Which of the following is a weak base?

When the equation Al + O2→ Al2O3 is balanced, the coefficient of Al is

The number of moles of solute per liter of solution is called the ______________ of the solution.

When there is a net release of energy in a chemical reaction, it is called a(n) ______________ reaction.

State which element is oxidized and which is reduced in the reaction Al + 3F2 → 2AlF3.

​Balance the chemical equation: Bi2S3+ O2 → Bi2O3 + SO2

When the equation Al + O2→ Al2O3 is balanced, the coefficient of O2 is

Which acid is present in vinegar?

By definition, the removal of oxygen from a compound is called

In chemical equations, numbers placed before formulas are known as ______________.

Each of the following general equations illustrates what basic type of chemical reaction? a. AB + CD → AD + CB ______________ b. A + B → AB ______________ c. A + BC → AC + B ______________ d. AB → A + B ______________

How many molecules are in 1.00 mol of sulfur dioxide, SO2?

Which of the following is an example of a chemical property?

A reaction will occur when a piece of Mg is placed in aqueous Zn(NO3)2 if Mg is ______________ Zn in the activity series.

The substances that are diminished in a chemical reaction are called the

Which type of reaction is 2Fe2O3+ 3C→ 4Fe+ 3CO2?

The substances formed in a chemical reaction are called the ______________.

In order, from top to bottom, in the activity series come K, Zn, Pb, H, Cu, and Au. Therefore,

Which one of the following is not a physical property of matter?

A solution with a pH of 8 is

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When the equation Al + O₂→ Al₂O₃ is balanced, the coefficient of Al is

State which element is oxidized and which is reduced in the reaction Al + 3F₂ → 2AlF_3.

Balance the chemical equation: Bi2S3+ O2 → Bi2O3 + SO2

When the equation Al + O₂→ Al₂O₃ is balanced, the coefficient of O₂ is

Each of the following general equations illustrates what basic type of chemical reaction? a. AB + CD → AD + CB b. A + B → AB c. A + BC → AC + B d. AB → A + B

How many molecules are in 1.00 mol of sulfur dioxide, SO₂?

A reaction will occur when a piece of Mg is placed in aqueous Zn(NO₃)₂ if Mg is ______________ Zn in the activity series.

Which type of reaction is 2Fe₂O₃+ 3C→ 4Fe+ 3CO₂?