Question 1

The reaction between water solutions of sodium chloride and silver nitrate produces a precipitate: NaCl(aq) + AgNO3(aq) $\rarr$ NaNO3(aq) + AgCl(s).This is an example of

Accepted Answer

A) decomposition. 
B) combination. 
C) replacement. 
D) ion exchange. 
A) decomposition. 
B) combination. 
C) replacement. 
D) ion exchange.

Question 2

Consider the chemical equation:   
-What is the number of atoms on each side of the equation?

Accepted Answer

A) 5 
B) 6 
C) 7 
D) 9 
A) 5 
B) 6 
C) 7 
D) 9

Question 3

When the equation __Li + __O2 $\rarr$ __Li2O is correctly balanced, what is the sum of the coefficients?

Accepted Answer

A) 3 
B) 5 
C) 7 
D) 12 
A) 3 
B) 5 
C) 7 
D) 12

Question 4

Which of the following is a sign of an ion exchange reaction?

Accepted Answer

A) a precipitate is formed 
B) a compound is broken down into simpler substances 
C) a reactant is oxidized 
D) a metal ion is reduced 
A) a precipitate is formed 
B) a compound is broken down into simpler substances 
C) a reactant is oxidized 
D) a metal ion is reduced

Question 5

How many molecules are in a 8.0-g sample of oxygen gas, O2?

Accepted Answer

A) 6.0 * 1023 
B) 3.0 * 1023 
C) 1.5 * 1023 
D) 12.0 * 1023 
A) 6.0 * 1023 
B) 3.0 * 1023 
C) 1.5 * 1023 
D) 12.0 * 1023

Question 6

The equation 2 C2H5OH + __O2 $\rarr$ 4 CO2 + 6 H2O is balanced by making the coefficient of oxygen

Accepted Answer

A) 14. 
B) 12. 
C) 7. 
D) 6. 
A) 14. 
B) 12. 
C) 7. 
D) 6.

Question 7

When balancing a chemical equation, the number of H atoms in 2 CH4 is eight.

Accepted Answer

A) True 
 B)False

Question 8

What is the formula weight of aluminum hydroxide, Al(OH)3?

Accepted Answer

A) 44 u 
B) 45 u 
C) 75 u 
D) 78 u 
A) 44 u 
B) 45 u 
C) 75 u 
D) 78 u

Question 9

The sum of the coefficients must be the same on both sides of a chemical equation.

Accepted Answer

A) True 
 B)False

Question 10

What is the mass percent of sodium in washing soda, Na2CO3?

Accepted Answer

A) 43.4% 
B) 32.5% 
C) 21.7% 
D) 62.1% 
A) 43.4% 
B) 32.5% 
C) 21.7% 
D) 62.1%

The reaction between water solutions of sodium chloride and silver nitrate produces a precipitate: NaCl_(a_q) + AgNO_3(aq) $\rarr$ NaNO_3(aq) + AgCl_(s).This is an example of

Consider the chemical equation: -What is the number of atoms on each side of the equation?

When the equation Li + O₂ $\rarr$ __Li₂O is correctly balanced, what is the sum of the coefficients?

Which of the following is a sign of an ion exchange reaction?

How many molecules are in a 8.0-g sample of oxygen gas, O₂?

The equation 2 C₂H₅OH + __O₂ $\rarr$ 4 CO₂ + 6 H₂O is balanced by making the coefficient of oxygen

When balancing a chemical equation, the number of H atoms in 2 CH₄ is eight.

What is the formula weight of aluminum hydroxide, Al(OH)₃?

The sum of the coefficients must be the same on both sides of a chemical equation.

What is the mass percent of sodium in washing soda, Na₂CO₃?

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Exam 10: Chemical Reactions

The reaction between water solutions of sodium chloride and silver nitrate produces a precipitate: NaCl(aq) + AgNO3(aq) →\rarr→ NaNO3(aq) + AgCl(s).This is an example of

Consider the chemical equation: -What is the number of atoms on each side of the equation?

When the equation __Li + __O2 →\rarr→ __Li2O is correctly balanced, what is the sum of the coefficients?

Which of the following is a sign of an ion exchange reaction?

How many molecules are in a 8.0-g sample of oxygen gas, O2?

The equation 2 C2H5OH + __O2 →\rarr→ 4 CO2 + 6 H2O is balanced by making the coefficient of oxygen

When balancing a chemical equation, the number of H atoms in 2 CH4 is eight.

What is the formula weight of aluminum hydroxide, Al(OH)3?

The sum of the coefficients must be the same on both sides of a chemical equation.

What is the mass percent of sodium in washing soda, Na2CO3?

What Is Science

Motion

Energy

Heat and Temperature

Wave Motions and Sound

Electricity

Light

Atoms and Periodic Properties

Chemical Bonds

Water and Solutions

Organic Chemistry

Nuclear Reactions

The Universe

The Solar System

Earth in Space

Rocks and Minerals

Plate Tectonics

Building Earths Surface

Shaping Earths Surface

Geologic Time

The Atmosphere of Earth

Weather and Climate

Earths Waters

Filters

The reaction between water solutions of sodium chloride and silver nitrate produces a precipitate: NaCl_(a_q) + AgNO_3(aq) $\rarr$ NaNO_3(aq) + AgCl_(s).This is an example of

When the equation Li + O₂ $\rarr$ __Li₂O is correctly balanced, what is the sum of the coefficients?

How many molecules are in a 8.0-g sample of oxygen gas, O₂?

The equation 2 C₂H₅OH + __O₂ $\rarr$ 4 CO₂ + 6 H₂O is balanced by making the coefficient of oxygen

When balancing a chemical equation, the number of H atoms in 2 CH₄ is eight.

What is the formula weight of aluminum hydroxide, Al(OH)₃?

What is the mass percent of sodium in washing soda, Na₂CO₃?