Question 1

The blood buffer reactions described by H2CO3    
 H+ + HCO3- indicate that

Accepted Answer

A)  scientists are uncertain which direction the equation flows.
B)  the reaction can flow either direction depending on whether there is too much H+ or more H+ is needed.
C)  any reaction in one direction causes an immediate reverse reaction.
D)  chemicals can swing wildly from acidic to basic.
E)  the reaction goes back and forth in an unpredictable manner.F) D) and E)
G) All of the above

Question 2

Use Bohr's model to draw a sodium (Na)atom and a chlorine (Cl)atom.Using your model,explain what happens when sodium reacts with chlorine to form table salt.Include in your explanation ion and ionic bond formation.

Accepted Answer

Sodium donates an electron to chlorine t...

Question 3

An atom's atomic mass is best described as the mass of

Accepted Answer

A)  the protons it contains.
B)  the neutrons it contains.
C)  electrons in the outermost shell.
D)  protons and neutrons it contains.
E)  protons and electrons it contains.F) A) and E)
G) A) and C)

Question 4

Which of the following statements is/are true about the pH scale?
-The scale ranges from 1 to 15.

Accepted Answer

A) True 
 B)False

Question 5

As a solid,water floats.This means that

Accepted Answer

A)  solid water is less dense than liquid water.
B)  organisms in ponds,lakes,and reservoirs can survive under the ice cover.
C)  the hydrogen bond arrangement differs between ice and liquid water.
D)  All of the choices are correct.E) None of the above
F) A) and D)

Question 6

Your roommate has heartburn and you hand her a bottle of antacids.She wants you to explain how the antacids will make her feel better.What do you tell her?

Accepted Answer

A)  Antacids dilute the solution,therefore lowering the pH.
B)  Antacids are bases and can take up H+ thereby reducing the acidity of the solution.
C)  Antacids are bases and by definition can take up OH- thereby increasing the acidity of the solution.
D)  Antacids contain mostly water and so they neutralize the solution.E) B) and C)
F) C) and D)

Question 7

What does this graph reveal about the heat of vaporization and the heat of fusion?

Accepted Answer

After studying the graph,one sees that i...

Question 8

In a water molecule,

Accepted Answer

A)  the oxygen atom is more electronegative than the hydrogen atoms.
B)  the oxygen atom has an overall negative charge with the hydrogen atoms having an overall positive charge.
C)  unequal sharing of electrons results in a polar molecule.
D)  All of the choices are correct.E) A) and B)
F) A) and C)

Question 9

What relationship can be determined from the following information: 
• The radioactive isotope iodine 131 has a half-life of 8.1 days and emits 0.8 MeV (milli-electronvolts) of energy.
• The radioactive isotope phosphorus 32 has a half-life of 14.3 days and emits 1.7 MeV of energy.
• The radioactive isotope phosphorus 33 has a half-life of 25.5 days and emits 0.25 MeV of energy.
• The radioactive isotope sulfur 35 has a half-life of 87.5 days and emits 0.2 MeV of energy.

Accepted Answer

A)  The longer the half-life,the more energy emitted by the particles.
B)  The longer the half-life,the less energy emitted by the particles.
C)  Radioisotopes of the same element must emit the same amount of energy in their emissions and decay at the same rate.
D)  Adjusted for time,radioisotopes emit the same amount of energy in their emissions.
E)  Energy and half-life are not directly related.F) B) and E)
G) All of the above

Question 10

Which of the following elements would be the most reactive with other elements?

Accepted Answer

A)  boron,#5
B)  neon,#10
C)  argon,#18
D)  helium,#2E) A) and B)
F) B) and D)

Question 11

If an element contains eight electrons how many electrons will be placed in the second valence shell?

Accepted Answer

A)  6
B)  2
C)  8
D)  5
E)  11F) A) and B)
G) A) and C)

Question 12

Which type of covalent bond is the strongest?

Accepted Answer

A)  single
B)  double
C)  triple
D)  quadruple
E)  All covalent bonds are equal in strength.F) C) and D)
G) A) and D)

Question 13

All of the following are examples of damage caused by acid deposition from rain EXCEPT

Accepted Answer

A)  leaching of aluminum from the soil into lakes which results in the formation of toxic methyl mercury from mercury in the lake sediments.
B)  weakens trees in the forests and kills seedlings.
C)  increased agricultural yields.
D)  damage to marble and limestone monuments.E) A) and C)
F) All of the above

Question 14

Which of the following statements is/are true about the pH scale?
-A change of one pH unit represents a ten-fold increase or decrease in hydroxide ion concentration.

Accepted Answer

A) True 
 B)False

Exam 2: Basic Chemistry

What does this graph reveal about the heat of vaporization and the heat of fusion?

Correct Answer
verified
After studying the graph,one sees that i...
View Answer

Your roommate has heartburn and you hand her a bottle of antacids.She wants you to explain how the antacids will make her feel better.What do you tell her?

Correct Answer
verified

In a water molecule,

Correct Answer
verified

Which of the following statements is/are true about the pH scale? -The scale ranges from 1 to 15.

Correct Answer
verified

If an element contains eight electrons how many electrons will be placed in the second valence shell?

Correct Answer
verified

Which of the following elements would be the most reactive with other elements?

Correct Answer
verified

Correct Answer
verified

The blood buffer reactions described by H₂CO₃ <--------> H⁺ + HCO₃- indicate that

Correct Answer
verified

As a solid,water floats.This means that

Correct Answer
verified

Use Bohr's model to draw a sodium (Na)atom and a chlorine (Cl)atom.Using your model,explain what happens when sodium reacts with chlorine to form table salt.Include in your explanation ion and ionic bond formation.

Correct Answer
verified
Sodium donates an electron to chlorine t...
View Answer

All of the following are examples of damage caused by acid deposition from rain EXCEPT

Correct Answer
verified

Which type of covalent bond is the strongest?

Correct Answer
verified

Which of the following statements is/are true about the pH scale? -A change of one pH unit represents a ten-fold increase or decrease in hydroxide ion concentration.

Correct Answer
verified

An atom's atomic mass is best described as the mass of

Correct Answer
verified

Exam 2: Basic Chemistry

What does this graph reveal about the heat of vaporization and the heat of fusion?

Correct AnswerverifiedAfter studying the graph,one sees that i...View AnswerShow Answer

Your roommate has heartburn and you hand her a bottle of antacids.She wants you to explain how the antacids will make her feel better.What do you tell her?

Correct AnswerverifiedShow Answer

In a water molecule,

Correct AnswerverifiedShow Answer

Which of the following statements is/are true about the pH scale? -The scale ranges from 1 to 15.

Correct AnswerverifiedShow Answer

If an element contains eight electrons how many electrons will be placed in the second valence shell?

Correct AnswerverifiedShow Answer

Which of the following elements would be the most reactive with other elements?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The blood buffer reactions described by H2CO3 <--------> H+ + HCO3- indicate that

Correct AnswerverifiedShow Answer

As a solid,water floats.This means that

Correct AnswerverifiedShow Answer

Use Bohr's model to draw a sodium (Na)atom and a chlorine (Cl)atom.Using your model,explain what happens when sodium reacts with chlorine to form table salt.Include in your explanation ion and ionic bond formation.

Correct AnswerverifiedSodium donates an electron to chlorine t...View AnswerShow Answer

All of the following are examples of damage caused by acid deposition from rain EXCEPT

Correct AnswerverifiedShow Answer

Which type of covalent bond is the strongest?

Correct AnswerverifiedShow Answer

Which of the following statements is/are true about the pH scale? -A change of one pH unit represents a ten-fold increase or decrease in hydroxide ion concentration.

Correct AnswerverifiedShow Answer

An atom's atomic mass is best described as the mass of

Correct AnswerverifiedShow Answer

Correct Answer
verified
After studying the graph,one sees that i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The blood buffer reactions described by H₂CO₃ <--------> H⁺ + HCO₃- indicate that

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Sodium donates an electron to chlorine t...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified