Question 1

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 2

Which one of the following is a physical change?

Accepted Answer

A)  Rusting of iron 
B)  Fermenting of grape juice 
C)  Souring of milk 
D)  Sharpening a pencil 
A)  Rusting of iron 
B)  Fermenting of grape juice 
C)  Souring of milk 
D)  Sharpening a pencil

Question 3

6.02 × 1023 is known as ______________.

Accepted Answer

Question 4

The rate of a chemical reaction would be decreased by

Accepted Answer

A)  stirring the reactants. 
B)  increasing the concentration of the reactants. 
C)  adding a catalyst to the reactants. 
D)  cooling the reactants. 
A)  stirring the reactants. 
B)  increasing the concentration of the reactants. 
C)  adding a catalyst to the reactants. 
D)  cooling the reactants.

Question 5

When aqueous solutions of Na2CO3 and BaCl2 are mixed, the products are NaCl and ______________.

Accepted Answer

Question 6

The H3O+ ion is called the ______________ ion.

Accepted Answer

Question 7

By definition, the addition of oxygen to a substance is called

Accepted Answer

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

Question 8

What is the molarity of a solution that contains 2 mol of solute in 4 L of solution?

Accepted Answer

The answer of What is the molarity of a solution...

Question 9

In general, fast reactions

Accepted Answer

A)  are exothermic. 
B)  are endothermic. 
C)  have low activation energies. 
D)  have high activation energies. 
A)  are exothermic. 
B)  are endothermic. 
C)  have low activation energies. 
D)  have high activation energies.

Question 10

The equation 1/2 N2 + 3/2 H2→ NH3 is not appropriately written because

Accepted Answer

A)  the number of atoms of each element on each side is not the same. 
B)  fractional coefficients are not generally used. 
C)  nitrogen is not diatomic. 
D)  the product is N2H4, not NH3. 
A)  the number of atoms of each element on each side is not the same. 
B)  fractional coefficients are not generally used. 
C)  nitrogen is not diatomic. 
D)  the product is N2H4, not NH3.

Question 11

One mole of aluminum consists of ______________ aluminum atoms.

Accepted Answer

6.02 * 10<

Question 12

When an element is oxidized, it ______________ electrons.

Accepted Answer

The answer of When an element is oxidized, it ______________...

Question 13

What basic type of reaction is illustrated by the general equation AB → A + B?

Accepted Answer

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

Question 14

State which element is oxidized and which is reduced in the reaction Fe + Cl2→ FeCl2.

Accepted Answer

Fe is oxid

Question 15

Complete and balance the equation: Al + HCl → ____________________

Accepted Answer

2Al + 6HCl

Question 16

Which of the following is a chemical change?

Accepted Answer

A)  Dry ice subliming 
B)  Limestone being crushed to powder 
C)  Paper being shredded 
D)  Sulfur burning 
A)  Dry ice subliming 
B)  Limestone being crushed to powder 
C)  Paper being shredded 
D)  Sulfur burning

Question 17

When the equation Ca + H3PO4→ Ca3(PO4)2 + H2 is balanced, the sum of all the coefficients (both written and "understood") is ______________.

Accepted Answer

9 (coeffic

Question 18

How many moles would 44 g of carbon dioxide, CO2, be?

Accepted Answer

A)  3.0 
B)  2.0 
C)  1.0 
D)  None of these 
A)  3.0 
B)  2.0 
C)  1.0 
D)  None of these

Question 19

The definitions of an acid and a base as substances that give H+ and OH- ions, respectively, in water were proposed by the chemist named ______________.

Accepted Answer

Question 20

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

Accepted Answer

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

Exam 13: Chemical Reactions

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

Which one of the following is a physical change?

6.02 × 1023 is known as ______________.

The rate of a chemical reaction would be decreased by

When aqueous solutions of Na2CO3 and BaCl2 are mixed, the products are NaCl and ______________.

The H3O+ ion is called the ______________ ion.

By definition, the addition of oxygen to a substance is called

What is the molarity of a solution that contains 2 mol of solute in 4 L of solution?

In general, fast reactions

The equation 1/2 N2 + 3/2 H2→ NH3 is not appropriately written because

One mole of aluminum consists of ______________ aluminum atoms.

When an element is oxidized, it ______________ electrons.

What basic type of reaction is illustrated by the general equation AB → A + B?

State which element is oxidized and which is reduced in the reaction Fe + Cl2→ FeCl2.

Complete and balance the equation: Al + HCl → ____________________

Which of the following is a chemical change?

When the equation Ca + H3PO4→ Ca3(PO4)2 + H2 is balanced, the sum of all the coefficients (both written and "understood") is ______________.

How many moles would 44 g of carbon dioxide, CO2, be?

The definitions of an acid and a base as substances that give H+ and OH- ions, respectively, in water were proposed by the chemist named ______________.

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

Measurement

Motion

Force and Motion

Work and Energy

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Bonding

Organic Chemistry

Place and Time

The Solar System

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural G Eology and P Late Tectonics

Minerals, Rocks, and Volcanoes

Surface Processes

Geologic Time

Filters

6.02 × 10²³ is known as ______________.

When aqueous solutions of Na₂CO₃ and BaCl₂ are mixed, the products are NaCl and ______________.

The H₃O⁺ ion is called the ______________ ion.

The equation 1/2 N₂ + 3/2 H₂→ NH₃ is not appropriately written because

State which element is oxidized and which is reduced in the reaction Fe + Cl₂→ FeCl_2.

When the equation Ca + H₃PO₄→ Ca₃(PO₄)₂ + H₂ is balanced, the sum of all the coefficients (both written and "understood") is ______________.

How many moles would 44 g of carbon dioxide, CO₂, be?

The definitions of an acid and a base as substances that give H⁺ and OH^- ions, respectively, in water were proposed by the chemist named ______________.

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