Question 1

Which type of reaction is 4Al + 3O2 $\to$ 2Al2O3?

Accepted Answer

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

Question 2

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

Accepted Answer

Al is oxidized; F is reduced.

Question 3

When the equation H2O + NO2 $\to$ NO + HNO3 is balanced, the sum of all the coefficients (both written and "understood") is ______________.

Accepted Answer

7 (coefficients in order are 1, 3, 1, 2)

Question 4

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 5

An acid added to a base will produce a

Accepted Answer

A)  salt and hydrogen ions. 
B)  salt and hydroxide ions. 
C)  salt and water. 
D)  stronger acid and base. 
A)  salt and hydrogen ions. 
B)  salt and hydroxide ions. 
C)  salt and water. 
D)  stronger acid and base.

Question 6

Balance the chemical equation: NO2 + H2O $\to$ HNO3 + NO

Accepted Answer

3NO₂ + H<

Question 7

How many moles of He would 3.01 $\times$ 1023 helium atoms be?

Accepted Answer

A)  2.00 
B)  4.00 
C)  0.50 
D)  1.00 
E)  None of these 
A)  2.00 
B)  4.00 
C)  0.50 
D)  1.00 
E)  None of these

Question 8

Increased reactant concentration usually leads to an increase in reaction rate, because collisions are

Accepted Answer

A)  more violent only. 
B)  more frequent only. 
C)  both more violent and more frequent. 
D)  none of these 
A)  more violent only. 
B)  more frequent only. 
C)  both more violent and more frequent. 
D)  none of these

Question 9

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 10

When an acid reacts with a carbonate or hydrogen carbonate, the products are water, carbon dioxide, and _______________.

Accepted Answer

The answer of When an acid reacts with a carbonate...

Question 11

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 12

______________ 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 13

Most ______________ do their jobs by decreasing the activation energy for a reaction.

Accepted Answer

The answer of Most ______________ do their jobs by decreasing...

Question 14

When an acid reacts with a carbonate or hydrogen carbonate, the products are ____________, carbon dioxide, and a salt.

Accepted Answer

The answer of When an acid reacts with a carbonate...

Question 15

The H3O+ ion is called the ______________ ion.

Accepted Answer

Question 16

For an endothermic reaction, the energy barrier is ______________ on the reactant side than on the product side.

Accepted Answer

A)  greater 
B)  not different in size 
C)  smaller 
A)  greater 
B)  not different in size 
C)  smaller

Question 17

What type of reaction gives CO2 and H2O as the only products?

Accepted Answer

A)  Complete hydrocarbon combustion 
B)  Acid-base reaction 
C)  Acid-carbonate reaction 
D)  Single-replacement, with an acid and an active metal 
A)  Complete hydrocarbon combustion 
B)  Acid-base reaction 
C)  Acid-carbonate reaction 
D)  Single-replacement, with an acid and an active metal

Question 18

Name four factors that influence the rate of chemical reactions.

Accepted Answer

Temperature, concent

Question 19

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 20

When a hydrocarbon or carbon-hydrogen-oxygen compound is burned completely, the products are

Accepted Answer

A)  CO2 and H2O. 
B)  CH2 and O2. 
C)  CO and H2. 
D)  C and H2. 
A)  CO2 and H2O. 
B)  CH2 and O2. 
C)  CO and H2. 
D)  C and H2.

Which type of reaction is 4Al + 3O₂ $\to$ 2Al₂O₃?

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

When the equation H₂O + NO₂ $\to$ NO + HNO₃ is balanced, the sum of all the coefficients (both written and "understood") is ______________.

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

An acid added to a base will produce a

Balance the chemical equation: NO₂ + H₂O $\to$ HNO₃ + NO

How many moles of He would 3.01 $\times$ 10²³helium atoms be?

Increased reactant concentration usually leads to an increase in reaction rate, because collisions are

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

When an acid reacts with a carbonate or hydrogen carbonate, the products are water, carbon dioxide, and _______________.

What is the identity of stomach acid?

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

Most ______________ do their jobs by decreasing the activation energy for a reaction.

When an acid reacts with a carbonate or hydrogen carbonate, the products are ____________, carbon dioxide, and a salt.

The H₃O⁺ ion is called the ______________ ion.

For an endothermic reaction, the energy barrier is ______________ on the reactant side than on the product side.

What type of reaction gives CO₂ and H₂O as the only products?

Name four factors that influence the rate of chemical reactions.

Which acid is present in vinegar?

When a hydrocarbon or carbon-hydrogen-oxygen compound is burned completely, the products are

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Bonding

Chemical Reactions

Organic Chemistry

Place and Time

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural Geology and Plate Tectonics

Minerals Rocks and Volcanoes

Surface Processes

Geologic Time

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Exam 13: The Solar System

Which type of reaction is 4Al + 3O2 →\to→ 2Al2O3?

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

When the equation H2O + NO2 →\to→ NO + HNO3 is balanced, the sum of all the coefficients (both written and "understood") is ______________.

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

An acid added to a base will produce a

Balance the chemical equation: NO2 + H2O →\to→ HNO3 + NO

How many moles of He would 3.01 ×\times× 1023 helium atoms be?

Increased reactant concentration usually leads to an increase in reaction rate, because collisions are

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

When an acid reacts with a carbonate or hydrogen carbonate, the products are water, carbon dioxide, and _______________.

What is the identity of stomach acid?

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

Most ______________ do their jobs by decreasing the activation energy for a reaction.

When an acid reacts with a carbonate or hydrogen carbonate, the products are ____________, carbon dioxide, and a salt.

The H3O+ ion is called the ______________ ion.

For an endothermic reaction, the energy barrier is ______________ on the reactant side than on the product side.

What type of reaction gives CO2 and H2O as the only products?

Name four factors that influence the rate of chemical reactions.

Which acid is present in vinegar?

When a hydrocarbon or carbon-hydrogen-oxygen compound is burned completely, the products are

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Bonding

Chemical Reactions

Organic Chemistry

Place and Time

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural Geology and Plate Tectonics

Minerals Rocks and Volcanoes

Surface Processes

Geologic Time

Filters

Which type of reaction is 4Al + 3O₂ $\to$ 2Al₂O₃?

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

When the equation H₂O + NO₂ $\to$ NO + HNO₃ is balanced, the sum of all the coefficients (both written and "understood") is ______________.

Balance the chemical equation: NO₂ + H₂O $\to$ HNO₃ + NO

How many moles of He would 3.01 $\times$ 10²³helium atoms be?

The H₃O⁺ ion is called the ______________ ion.

What type of reaction gives CO₂ and H₂O as the only products?