Question 1

When an atom or ion gives up electrons, it is said to be ______________.

Accepted Answer

oxidized

Question 2

In the reaction 2Al + 3F2→ 2AlF3, the aluminum

Accepted Answer

A)  is reduced. 
B)  gains electrons. 
C)  is oxidized. 
D)  is the catalyst. 
A)  is reduced. 
B)  gains electrons. 
C)  is oxidized. 
D)  is the catalyst. C

Question 3

A solution with a pH of 6 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. D

Question 4

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

Accepted Answer

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

Question 5

Which type of reaction is 2Cu(NO3)2→ 2CuO + 4NO2 + O2?

Accepted Answer

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

Question 6

One product of photosynthesis is

Accepted Answer

A)  hydrogen. 
B)  oxygen. 
C)  carbon dioxide. 
D)  methane. 
A)  hydrogen. 
B)  oxygen. 
C)  carbon dioxide. 
D)  methane.

Question 7

How many atoms of oxygen are contained in 44 g of carbon dioxide, CO2?

Accepted Answer

A)  3.01 × 1023 
B)  12.0 × 1023 
C)  6.02 × 1023 
D)  None of these 
A)  3.01 × 1023 
B)  12.0 × 1023 
C)  6.02 × 1023 
D)  None of these

Question 8

Acids give what ions in aqueous solutions?

Accepted Answer

A)  SO42- 
B)  Cl- 
C)  OH- 
D)  H+ 
A)  SO42- 
B)  Cl- 
C)  OH- 
D)  H+

Question 9

The rate of a chemical reaction would be increased by

Accepted Answer

A)  increasing the surface area of the reactants. 
B)  increasing the concentration of the reactants. 
C)  adding a catalyst to the reactants. 
D)  heating the reactants. 
E)  all of the above. 
A)  increasing the surface area of the reactants. 
B)  increasing the concentration of the reactants. 
C)  adding a catalyst to the reactants. 
D)  heating the reactants. 
E)  all of the above.

Question 10

In the reaction 2Al + 3F2→ 2AlF3, the fluorine

Accepted Answer

A)  is reduced. 
B)  loses electrons. 
C)  is oxidized. 
D)  is the catalyst. 
A)  is reduced. 
B)  loses electrons. 
C)  is oxidized. 
D)  is the catalyst.

Question 11

When the equation Sb2S3 + HCl → SbCl3 + H2S is balanced, the coefficient of H2S is

Accepted Answer

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

Question 12

What basic type of reaction is illustrated by the general equation AB + CD → AD + BC?

Accepted Answer

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

Question 13

Which answer is incorrect? A base is a substance that, when dissolved in water,

Accepted Answer

A)  reacts with an acid to neutralize its properties. 
B)  reacts with many metals to liberate O2. 
C)  changes the color of litmus dye from red to blue. 
D)  conducts electricity. 
A)  reacts with an acid to neutralize its properties. 
B)  reacts with many metals to liberate O2. 
C)  changes the color of litmus dye from red to blue. 
D)  conducts electricity.

Question 14

Which type of reaction is Zn + 2HCl → ZnCl2 + H2?

Accepted Answer

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

Question 15

A chemical reaction is balanced by applying all except which of the following principles?

Accepted Answer

A)  No atoms are gained, lost, or changed in identity. 
B)  Only the numbers preceding formulas can be changed. 
C)  The set of smallest whole numbers should be used. 
D)  Subscripts in the formulas may be changed if necessary. 
A)  No atoms are gained, lost, or changed in identity. 
B)  Only the numbers preceding formulas can be changed. 
C)  The set of smallest whole numbers should be used. 
D)  Subscripts in the formulas may be changed if necessary.

Question 16

What is the identity of stomach acid?

Accepted Answer

A)  HC2H3O2 
B)  H2CO3 
C)  HCl 
D)  H3PO4 
A)  HC2H3O2 
B)  H2CO3 
C)  HCl 
D)  H3PO4

Question 17

A solution with pH greater than 7 is classified as a(n) ______________.

Accepted Answer

The answer of A solution with pH greater than 7...

Question 18

A chemical reaction generally has a great effect on an atom's

Accepted Answer

A)  nuclear structure. 
B)  mass. 
C)  nuclear binding energy. 
D)  electron configuration. 
A)  nuclear structure. 
B)  mass. 
C)  nuclear binding energy. 
D)  electron configuration.

Question 19

A solution of pH 5 is ______________ times as acidic as a solution of pH 6.

Accepted Answer

The answer of A solution of pH 5 is ______________...

Question 20

The reaction Fe + CuSO4 → Cu + FeSO4 is a(n) ______________-replacement reaction.

Accepted Answer

Exam 13: Chemical Reactions

When an atom or ion gives up electrons, it is said to be ______________.

In the reaction 2Al + 3F2→ 2AlF3, the aluminum

A solution with a pH of 6 is

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

Which type of reaction is 2Cu(NO3)2→ 2CuO + 4NO2 + O2?

One product of photosynthesis is

How many atoms of oxygen are contained in 44 g of carbon dioxide, CO2?

Acids give what ions in aqueous solutions?

The rate of a chemical reaction would be increased by

In the reaction 2Al + 3F2→ 2AlF3, the fluorine

When the equation Sb2S3 + HCl → SbCl3 + H2S is balanced, the coefficient of H2S is

What basic type of reaction is illustrated by the general equation AB + CD → AD + BC?

Which answer is incorrect? A base is a substance that, when dissolved in water,

Which type of reaction is Zn + 2HCl → ZnCl2 + H2?

A chemical reaction is balanced by applying all except which of the following principles?

What is the identity of stomach acid?

A solution with pH greater than 7 is classified as a(n) ______________.

A chemical reaction generally has a great effect on an atom's

A solution of pH 5 is ______________ times as acidic as a solution of pH 6.

The reaction Fe + CuSO4 → Cu + FeSO4 is a(n) ______________-replacement reaction.

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In the reaction 2Al + 3F₂→ 2AlF₃, the aluminum

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

Which type of reaction is 2Cu(NO₃)₂→ 2CuO + 4NO₂ + O₂?

How many atoms of oxygen are contained in 44 g of carbon dioxide, CO₂?

In the reaction 2Al + 3F₂→ 2AlF₃, the fluorine

When the equation Sb₂S₃ + HCl → SbCl₃ + H₂S is balanced, the coefficient of H₂S is

Which type of reaction is Zn + 2HCl → ZnCl₂ + H₂?

The reaction Fe + CuSO₄ → Cu + FeSO₄ is a(n) ______________-replacement reaction.