Question 1

What mass of potassium chloride, a salt substitute often used by heart patients, can be produced directly from 5.2 g potassium and 7.9 g chlorine?

Accepted Answer

A)  5.2 g KCl 
B)  4.9 g KCl 
C)  9.9 g KCl 
D)  10.1 g KCl 
A)  5.2 g KCl 
B)  4.9 g KCl 
C)  9.9 g KCl 
D)  10.1 g KCl

Question 2

When properly balanced with whole number coefficients, what is the coefficient on H2O?
____HCl + ____Ba(OH)2    $\rightarrow$ ___BaCl2 + ___H2O

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  6 
A)  1 
B)  2 
C)  3 
D)  6

Question 3

If the charge on an ion changes from 2+ to 4+, the process occurring is ___.

Accepted Answer

The answer of If the charge on an ion changes...

Question 4

Barium and sulfur react to produce barium sulfide. What is the role of barium in this reaction?

Accepted Answer

A)  Barium is not affected by the processes of the chemical reaction. 
B)  Barium is being reduced. 
C)  Barium serves as the reducing agent. 
D)  Barium is the oxidizing agent. 
A)  Barium is not affected by the processes of the chemical reaction. 
B)  Barium is being reduced. 
C)  Barium serves as the reducing agent. 
D)  Barium is the oxidizing agent.

Question 5

Choose the comment that is appropriate for the reaction:

Accepted Answer

A)  Carbonic anhydrase catalyzes the conversion of carbon dioxide into carbonic acid. 
B)  The reaction runs in forward direction only. 
C)  This reaction runs in backward direction only. 
D)  This is a reaction that only occurs in the laboratory. 
A)  Carbonic anhydrase catalyzes the conversion of carbon dioxide into carbonic acid. 
B)  The reaction runs in forward direction only. 
C)  This reaction runs in backward direction only. 
D)  This is a reaction that only occurs in the laboratory.

Question 6

In chemical reaction

Accepted Answer

A)  the covalent bonds and ionic bonds that hold elements and compounds together remain intact as new bonds are formed 
B)  the covalent and ionic bonds that hold elements and compounds together are broken and no new bonds are formed 
C)  the covalent and ionic bonds that hold elements and compounds together are broken and new bonds are formed 
D)  neither new bonds are formed nor old bonds broken 
A)  the covalent bonds and ionic bonds that hold elements and compounds together remain intact as new bonds are formed 
B)  the covalent and ionic bonds that hold elements and compounds together are broken and no new bonds are formed 
C)  the covalent and ionic bonds that hold elements and compounds together are broken and new bonds are formed 
D)  neither new bonds are formed nor old bonds broken

Question 7

Tums tablets are composed of the substance calcium carbonate. Two tablets have a combined mass of 5.0 grams. Calcium carbonate reacts with and neutralizes excess stomach acid (hydrochloric acid). The products of this reaction are: water, calcium chloride, and carbon dioxide. How many moles of calcium carbonate are in one tablet?

Accepted Answer

The answer of Tums tablets are composed of the substance...

Question 8

A synthesis reaction in which water is added to a double bond is called ___.

Accepted Answer

The answer of A synthesis reaction in which water is...

Question 9

A reaction that releases heat is called ___.

Accepted Answer

The answer of A reaction that releases heat is called...

Question 10

What was the earliest reported method of fighting infection in the operating room?

Accepted Answer

A)  The patient was treated with Betadine before surgery. 
B)  Carbolic acid was used on the surgeon's tools. 
C)  Listerine was the antiseptic of choice. 
D)  The surgeons washed with soap and chlorine water. 
A)  The patient was treated with Betadine before surgery. 
B)  Carbolic acid was used on the surgeon's tools. 
C)  Listerine was the antiseptic of choice. 
D)  The surgeons washed with soap and chlorine water.

What mass of potassium chloride, a salt substitute often used by heart patients, can be produced directly from 5.2 g potassium and 7.9 g chlorine?

When properly balanced with whole number coefficients, what is the coefficient on H₂O? __HCl + Ba(OH)₂ $\rightarrow$ _BaCl₂ + ___H₂O

If the charge on an ion changes from 2+ to 4+, the process occurring is ___.

Barium and sulfur react to produce barium sulfide. What is the role of barium in this reaction?

Choose the comment that is appropriate for the reaction:

In chemical reaction

A synthesis reaction in which water is added to a double bond is called ___.

A reaction that releases heat is called ___.

What was the earliest reported method of fighting infection in the operating room?

Science and Measurements

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An Introduction to Organic Compounds

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Acids, Bases, and Equilibrium

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

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Exam 5: Reactions

What mass of potassium chloride, a salt substitute often used by heart patients, can be produced directly from 5.2 g potassium and 7.9 g chlorine?

When properly balanced with whole number coefficients, what is the coefficient on H2O? ____HCl + ____Ba(OH)2 →\rightarrow→ ___BaCl2 + ___H2O

If the charge on an ion changes from 2+ to 4+, the process occurring is ___.

Barium and sulfur react to produce barium sulfide. What is the role of barium in this reaction?

Choose the comment that is appropriate for the reaction:

In chemical reaction

A synthesis reaction in which water is added to a double bond is called ___.

A reaction that releases heat is called ___.

What was the earliest reported method of fighting infection in the operating room?

Science and Measurements

Atoms and Elements

Compounds

An Introduction to Organic Compounds

Gases, Solutions, Colloids, and Suspensions

Acids, Bases, and Equilibrium

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

Lipids and Membranes

Peptides, Proteins, and Enzymes

Nucleic Acids

Metabolism

Filters

When properly balanced with whole number coefficients, what is the coefficient on H₂O? __HCl + Ba(OH)₂ $\rightarrow$ _BaCl₂ + ___H₂O