Question 1

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+ D

Question 2

6.02 × 1023 is known as ______________.

Accepted Answer

Avogadro's number

Question 3

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

Accepted Answer

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

Question 4

______________ properties are those that do not describe the chemical reactivity of the substance.

Accepted Answer

The answer of ______________ properties are those that do not...

Question 5

When the equation NH4NO3→ N2O + H2O is balanced,the coefficient of H2O is

Accepted Answer

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

Question 6

How many atoms are in 1.00 mol of Mg?

Accepted Answer

A)  24.3 
B)  6.02 × 1023 
C)  24.3 × 6.02 × 1023 
D)  24.3 × 1023 
A)  24.3 
B)  6.02 × 1023 
C)  24.3 × 6.02 × 1023 
D)  24.3 × 1023

Question 7

A compound that contains water molecules as part of its formula is called

Accepted Answer

A)  a hydrate. 
B)  an anhydride. 
C)  a hydride. 
D)  a hydroxide. 
A)  a hydrate. 
B)  an anhydride. 
C)  a hydride. 
D)  a hydroxide.

Question 8

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 9

Balance the chemical equation: NO2 + H2O ? HNO3 + NO

Accepted Answer

3NO₂ + H₂O @#LAT-DLM&

Question 10

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

Accepted Answer

Al is oxid

Question 11

When solutions of AgNO3 and CaCl2 are mixed,which type of reaction is likely?

Accepted Answer

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

Question 12

A reaction in which a substance reacts with oxygen,bursts into flame,and forms an oxide is called a(n)______________ reaction.

Accepted Answer

The answer of A reaction in which a substance reacts...

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

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 15

Changes that alter the chemical composition of a substance are known as ______________ changes.

Accepted Answer

The answer of Changes that alter the chemical composition of...

Question 16

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

Accepted Answer

2Bi₂S₃ + 9O₂@#LAT-DLM&2

Question 17

When there is a net absorption 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 18

The loss of oxygen or gain of electrons by an atom or ion is called ______________.

Accepted Answer

The answer of The loss of oxygen or gain of...

Question 19

The energy necessary to start a chemical reaction is called the ______________ energy.

Accepted Answer

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

Question 20

In the activity series,Zn is more active than Pb.This means that

Accepted Answer

A)  Zn is a better catalyst than Pb. 
B)  Zn loses its electrons more easily than Pb. 
C)  Pb is more readily oxidized than Zn. 
D)  none of these 
A)  Zn is a better catalyst than Pb. 
B)  Zn loses its electrons more easily than Pb. 
C)  Pb is more readily oxidized than Zn. 
D)  none of these

Exam 13: Chemical Reactions

Acids give what ions in aqueous solutions?

6.02 × 1023 is known as ______________.

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

______________ properties are those that do not describe the chemical reactivity of the substance.

When the equation NH4NO3→ N2O + H2O is balanced,the coefficient of H2O is

How many atoms are in 1.00 mol of Mg?

A compound that contains water molecules as part of its formula is called

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

Balance the chemical equation: NO2 + H2O ? HNO3 + NO

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

When solutions of AgNO3 and CaCl2 are mixed,which type of reaction is likely?

A reaction in which a substance reacts with oxygen,bursts into flame,and forms an oxide is called a(n)______________ reaction.

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

The rate of a chemical reaction would be increased by

Changes that alter the chemical composition of a substance are known as ______________ changes.

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

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

The loss of oxygen or gain of electrons by an atom or ion is called ______________.

The energy necessary to start a chemical reaction is called the ______________ energy.

In the activity series,Zn is more active than Pb.This means that

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6.02 × 10²³ is known as ______________.

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

When the equation NH₄NO₃→ N₂O + H₂O is balanced,the coefficient of H₂O is

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

Balance the chemical equation: NO₂ + H₂O ? HNO₃ + NO

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

When solutions of AgNO₃ and CaCl₂ are mixed,which type of reaction is likely?