Question 1

pH 7 has a balanced level of H+ and OH-.

Accepted Answer

A) True 
 B)False

Question 2

If you place the corner of a paper towel into a droplet of water the water moves across the paper towel. Which of the following would explain the movement of the water?

Accepted Answer

A)   surface tension
B)   cohesion
C)   adhesion
D)   both cohesion and adhesionE) A) and D)
F) A) and C)

Question 3

Which statement is NOT true about ionic bonds?

Accepted Answer

A)   One atom acts as an electron donor and another atom acts as an electron acceptor.
B)   Electrons are completely lost or gained in ion formation.
C)   An ion has the same number of electrons as a nonionic atom of the same element.
D)   An ionic bond occurs between positive ions and negative ions.
E)   A salt such as NaCl is formed by an ionic reaction.F) A) and B)
G) C) and D)

Question 4

An abandoned Indiana coal mine spoil bank contains chunks of pyrite minerals. Under constant erosion and weathering, the pyrites leech large amounts of sulfuric acid (H2SO4) . The spoil banks are also mixed with large quantities of basic limestone and clay carbonates. What should occur over time?

Accepted Answer

A)   The pH level will drop until all acid has washed out.
B)   The pH level will remain at 7.0 because of constant washing with rain.
C)   The pH level will remain at 7.0 because all acid will be immediately neutralized by bases.
D)   The pH levels will be spotty and vary over time, first more acidic but drifting back toward 7.0.
E)   Bases always dominate over acids.F) A) and C)
G) B) and D)

Question 5

The electrons are unequally shared in _______, and transferred in __________.

Accepted Answer

A)   CH4, Na+Cl-
B)   O2, CH4
C)   Na+Cl-, H2O
D)   H2O, N2E) All of the above
F) A) and D)

Question 6

Prior to prescription medications to control stomach acid and "heart burn" people consumed baking soda (sodium bicarbonate)  to decrease their discomfort. This would indicate that sodium bicarbonate

Accepted Answer

A)   effectively buffers stomach acid by releasing H+.
B)   should be sold as a prescription drug.
C)   blocks acid production by combining with OH-.
D)   neutralizes stomach acid by combining with excess H+.E) A) and C)
F) None of the above

Question 7

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) B) and C)
G) A) and B)

Question 8

Study the chart to determine the relationship between H+ concentration and pH. If you were to create a herbal remedy to decrease excess stomach acid, would you create a solution with a relatively greater or lesser number of hydrogen ions.

Accepted Answer

Study of the chart confirms that as pH d...

Question 9

Which of the following statements is NOT true about electron configurations?

Accepted Answer

A)   If an atom has only one shell, it is complete with two electrons.
B)   If an atom has two or more shells, the octet rule applies.
C)   If an atom has two or more shells, the outer shell is complete with eight electrons.
D)   Atoms with more than eight electrons in the outer shell react by gaining electrons.
E)   Atoms with eight electrons in the outer shell are not reactive at all.F) B) and D)
G) A) and C)

Question 10

All living things are 70 - 90% water. Use this graph to explain what characteristics of water protect living organisms from rapid temperature changes.

Accepted Answer

Converting 1 gm of the hottest liquid wa...

Question 11

Which of the following concept circles best depicts the relationship between molecules and compounds (c = compound and m = molecule) ?

Accepted Answer

A)   Option A
B)   Option B
C)   Option CD) B) and C)
E) A) and B)

Question 12

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na+Cl-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

Accepted Answer

There is an attraction of positively cha...

Question 13

Which of the following is/are an atom, an isotope and an ion?

Accepted Answer

A)   H+
B)   2H or deuterium
C)   3H or tritium
D)   H2 or hydrogen gas
E)   All of the choices are atoms, isotopes and ions.F) A) and B)
G) A) and C)

Question 14

The blood buffer reactions described by H2CO3  
 
2CO3       H+ + HCO3- indicates that A)  scientists are uncertain which direction the equation flows. B)  the reaction can flow either direction depending on whether there is an excess of hydrogen or hydroxide ions. C)  any reaction in one direction causes an immediate reverse reaction. D)  chemicals can swing wildly from acid to basic. E)  there is really no difference in chemistry whether a molecule is formed or dissociated. " class="answers-bank-image d-inline" rel="preload" >
H+ + HCO3- indicates that

Accepted Answer

A)   scientists are uncertain which direction the equation flows.
B)   the reaction can flow either direction depending on whether there is an excess of hydrogen or hydroxide ions.
C)   any reaction in one direction causes an immediate reverse reaction.
D)   chemicals can swing wildly from acid to basic.
E)   there is really no difference in chemistry whether a molecule is formed or dissociated.F) A) and E)
G) None of the above

Question 15

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C and 14N, because over time the 14C-which originated in the atmosphere-breaks down into 14N. What net change occurred for this to happen?

Accepted Answer

A)   The 14C lost an electron.
B)   The 14C gained an electron.
C)   The 14C lost a proton.
D)   The 14C gained a proton.
E)   The 14C gained a neutron.F) B) and D)
G) C) and D)

Question 16

Which statement is NOT true about subatomic particles?

Accepted Answer

A)   Protons are found in the nucleus.
B)   Neutrons have no electrical charge.
C)   Electrons contain much less mass than neutrons.
D)   Electrons are found in orbitals around the nucleus.
E)   All electrons in an atom contain the same amount of energy.F) A) and C)
G) B) and C)

Question 17

A coastal climate is moderated primarily by which of the following properties of water? Water

Accepted Answer

A)   is the universal solvent.
B)   is cohesive and adhesive.
C)   has a high heat of evaporation.
D)   has a high surface tension.E) B) and D)
F) A) and C)

Question 18

Which of the following substances is hydrophilic?

Accepted Answer

A)   nonpolar substances
B)   polar substances
C)   ionic substances
D)   both polar and ionic substances
E)   All of the above are hydrophilicF) A) and E)
G) A) and C)

Question 19

Which is NOT true about the electrical charges in chemistry?

Accepted Answer

A)   Protons carry a positive charge.
B)   In an atom, the number of protons and neutrons must be equal.
C)   An atom is neutral when the positive and negative charges balance.
D)   An ion contains one or more positive or negative charges.E) A) and B)
F) None of the above

Question 20

Which of the following elements is NOT one of the six most common elements in living organisms?

Accepted Answer

A)   carbon
B)   oxygen
C)   iron
D)   nitrogen
E)   hydrogenF) A) and D)
G) B) and E)

Exam 2: Basic Chemistry

Which is NOT true about the electrical charges in chemistry?

Correct Answer
verified

If you place the corner of a paper towel into a droplet of water the water moves across the paper towel. Which of the following would explain the movement of the water?

Correct Answer
verified

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes ¹⁴C and ¹⁴N, because over time the ¹⁴C-which originated in the atmosphere-breaks down into ¹⁴N. What net change occurred for this to happen?

Correct Answer
verified

The electrons are unequally shared in _, and transferred in ____.

Correct Answer
verified

A coastal climate is moderated primarily by which of the following properties of water? Water

Correct Answer
verified

Prior to prescription medications to control stomach acid and "heart burn" people consumed baking soda (sodium bicarbonate) to decrease their discomfort. This would indicate that sodium bicarbonate

Correct Answer
verified

Study the chart to determine the relationship between H⁺ concentration and pH. If you were to create a herbal remedy to decrease excess stomach acid, would you create a solution with a relatively greater or lesser number of hydrogen ions.

Correct Answer
verified
Study of the chart confirms that as pH d...
View Answer

Which of the following statements is NOT true about electron configurations?

Correct Answer
verified

Which of the following elements is NOT one of the six most common elements in living organisms?

Correct Answer
verified

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na⁺Cl^-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

Correct Answer
verified
There is an attraction of positively cha...
View Answer

Which of the following is/are an atom, an isotope and an ion?

Correct Answer
verified

Correct Answer
verified

Which of the following substances is hydrophilic?

Correct Answer
verified

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

Correct Answer
verified

All living things are 70 - 90% water. Use this graph to explain what characteristics of water protect living organisms from rapid temperature changes.

Correct Answer
verified
Converting 1 gm of the hottest liquid wa...
View Answer

pH 7 has a balanced level of H⁺ and OH^-.

Correct Answer
verified

Which statement is NOT true about subatomic particles?

Correct Answer
verified

Which of the following concept circles best depicts the relationship between molecules and compounds (c = compound and m = molecule) ?

Correct Answer
verified

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

Correct Answer
verified

Which statement is NOT true about ionic bonds?

Correct Answer
verified

Exam 2: Basic Chemistry

Which is NOT true about the electrical charges in chemistry?

Correct AnswerverifiedShow Answer

If you place the corner of a paper towel into a droplet of water the water moves across the paper towel. Which of the following would explain the movement of the water?

Correct AnswerverifiedShow Answer

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C and 14N, because over time the 14C-which originated in the atmosphere-breaks down into 14N. What net change occurred for this to happen?

Correct AnswerverifiedShow Answer

The electrons are unequally shared in _______, and transferred in __________.

Correct AnswerverifiedShow Answer

A coastal climate is moderated primarily by which of the following properties of water? Water

Correct AnswerverifiedShow Answer

Prior to prescription medications to control stomach acid and "heart burn" people consumed baking soda (sodium bicarbonate) to decrease their discomfort. This would indicate that sodium bicarbonate

Correct AnswerverifiedShow Answer

Study the chart to determine the relationship between H+ concentration and pH. If you were to create a herbal remedy to decrease excess stomach acid, would you create a solution with a relatively greater or lesser number of hydrogen ions.

Correct AnswerverifiedStudy of the chart confirms that as pH d...View AnswerShow Answer

Which of the following statements is NOT true about electron configurations?

Correct AnswerverifiedShow Answer

Which of the following elements is NOT one of the six most common elements in living organisms?

Correct AnswerverifiedShow Answer

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na+Cl-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

Correct AnswerverifiedThere is an attraction of positively cha...View AnswerShow Answer

Which of the following is/are an atom, an isotope and an ion?

Correct AnswerverifiedShow Answer

An abandoned Indiana coal mine spoil bank contains chunks of pyrite minerals. Under constant erosion and weathering, the pyrites leech large amounts of sulfuric acid (H2SO4) . The spoil banks are also mixed with large quantities of basic limestone and clay carbonates. What should occur over time?

Correct AnswerverifiedShow Answer

Which of the following substances is hydrophilic?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

All living things are 70 - 90% water. Use this graph to explain what characteristics of water protect living organisms from rapid temperature changes.

Correct AnswerverifiedConverting 1 gm of the hottest liquid wa...View AnswerShow Answer

pH 7 has a balanced level of H+ and OH-.

Correct AnswerverifiedShow Answer

Which statement is NOT true about subatomic particles?

Correct AnswerverifiedShow Answer

Which of the following concept circles best depicts the relationship between molecules and compounds (c = compound and m = molecule) ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement is NOT true about ionic bonds?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes ¹⁴C and ¹⁴N, because over time the ¹⁴C-which originated in the atmosphere-breaks down into ¹⁴N. What net change occurred for this to happen?

Correct Answer
verified

The electrons are unequally shared in _, and transferred in ____.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Study the chart to determine the relationship between H⁺ concentration and pH. If you were to create a herbal remedy to decrease excess stomach acid, would you create a solution with a relatively greater or lesser number of hydrogen ions.

Correct Answer
verified
Study of the chart confirms that as pH d...
View Answer

Correct Answer
verified

Correct Answer
verified

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na⁺Cl^-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

Correct Answer
verified
There is an attraction of positively cha...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
Converting 1 gm of the hottest liquid wa...
View Answer

pH 7 has a balanced level of H⁺ and OH^-.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified