Question 1

Calcium is an example of

Accepted Answer

A) an alkali metal. 
B) a transition metal. 
C) an alkaline earth metal. 
D) a halogen. 
E) a chalcogen. 
A) an alkali metal. 
B) a transition metal. 
C) an alkaline earth metal. 
D) a halogen. 
E) a chalcogen.

Question 2

Enzymes in plants convert nitrate into ammonia.The unbalanced half-reaction equation is given below.What is the stoichiometric coefficient of the nitrite ion in the balanced reaction equation? 
NO3 -(aq) + H2O(l) + e-$\rightarrow$NO2 + (aq) ++OH-(aq)

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 3

ATP is an example of a molecule containing a phosphate

Accepted Answer

A) ester. 
B) aldehyde. 
C) alcohol. 
D) ketone. 
E) carboxylic acid. 
A) ester. 
B) aldehyde. 
C) alcohol. 
D) ketone. 
E) carboxylic acid.

Question 4

Which has the highest boiling point?

Accepted Answer

A) H2S 
B) H2O 
C) H2Te 
D) H2Se 
E) H2Po 
A) H2S 
B) H2O 
C) H2Te 
D) H2Se 
E) H2Po

Question 5

The average concentration of calcium in the human body is 15 mg/g of body mass.What is the mass of calcium in the body of a person weighing 150 lb? (1 lb = 454 g)

Accepted Answer

A) 1.0 lb 
B) 0.023 lb 
C) 23 lb 
D) 100 lb 
E) 2.3 lb 
A) 1.0 lb 
B) 0.023 lb 
C) 23 lb 
D) 100 lb 
E) 2.3 lb

Question 6

How much energy must be expended by a cell to transport 1 mole of sodium ions across a membrane with an electrochemical potential of 62 mV in order to maintain this potential?

Accepted Answer

A) 50 kJ 
B) 260 kJ 
C) 6.0 kJ 
D) 250 kJ 
E) 6,000 kJ 
A) 50 kJ 
B) 260 kJ 
C) 6.0 kJ 
D) 250 kJ 
E) 6,000 kJ

Question 7

How many oxygen atoms would be required to form an ionic compound with aluminum?

Accepted Answer

The answer of How many oxygen atoms would be required...

Question 8

Rubidium and Cesium are nonessential elements thought to be retained in the body because of their similarity in size and chemistry to what ion?

Accepted Answer

A) Na+ 
B) K+ 
C) Li+ 
D) Ba2+ 
E) Mg2+ 
A) Na+ 
B) K+ 
C) Li+ 
D) Ba2+ 
E) Mg2+

Question 9

In which of the following molecules/ions is nitrogen in the lowest oxidation state?

Accepted Answer

A) N2 
B) NO2 
C) NO -   
D) NH3 
E) N2O 
A) N2 
B) NO2 
C) NO -   
D) NH3 
E) N2O

Question 10

Which of the following elements would you expect to have the lowest first ionization energy?

Accepted Answer

A) F 
B) Br 
C) Cl 
D) I 
E) Xe 
A) F 
B) Br 
C) Cl 
D) I 
E) Xe

Question 11

Plants convert nitrate into ammonia by using enzymes called

Accepted Answer

A) peptidases. 
B) amylases. 
C) anhydrases. 
D) oxidases. 
E) reductases. 
A) peptidases. 
B) amylases. 
C) anhydrases. 
D) oxidases. 
E) reductases.

Question 12

The release of radioactive cesium-137 into the environment by the nuclear accident at Chernobyl produced a health hazard because cesium ions can substitute for _____in plants, making them unsafe for human consumption.

Accepted Answer

A) Mg2+ 
B) K+ 
C) Ca2+ 
D) Li- 
E) H+ 
A) Mg2+ 
B) K+ 
C) Ca2+ 
D) Li- 
E) H+

Question 13

Which of the following elements would you expect to have the greatest first ionization energy?

Accepted Answer

A) F 
B) C 
C) Li 
D) Be 
E) B 
A) F 
B) C 
C) Li 
D) Be 
E) B

Question 14

Which of the following compounds will have the lowest boiling point?

Accepted Answer

A) CCl4 
B) CI4 
C) CF4 
D) CH4 
E) CBr4 
A) CCl4 
B) CI4 
C) CF4 
D) CH4 
E) CBr4

Question 15

Plants convert nitrogen into ammonia.This biological nitrogen fixation is affected by enzymes called nitrogenases.The enzymes assist in the transfer of electrons.The unbalanced reaction equation is 
N (g) + H+aq) +e-$\rightarrow$ H (g) + NH (aq) 
 What is the change in the oxidation number of nitrogen in this reaction?

Accepted Answer

A) (+1) 
B) (-3) 
C) (+3) 
D) (+2) 
E) (-1) 
A) (+1) 
B) (-3) 
C) (+3) 
D) (+2) 
E) (-1)

Question 16

Iodine's role in the human body is very specific.It is incorporated into a hormone, _____, that regulates energy production and use.

Accepted Answer

A) melatonin 
B) thyroxine 
C) dopamine 
D) insulin 
E) iodocin 
A) melatonin 
B) thyroxine 
C) dopamine 
D) insulin 
E) iodocin

Calcium is an example of

Enzymes in plants convert nitrate into ammonia.The unbalanced half-reaction equation is given below.What is the stoichiometric coefficient of the nitrite ion in the balanced reaction equation? NO₃ -(aq) + H₂O(l) + e^- $\rightarrow$ NO₂ + (aq) ++OH^-(aq)

ATP is an example of a molecule containing a phosphate

Which has the highest boiling point?

The average concentration of calcium in the human body is 15 mg/g of body mass.What is the mass of calcium in the body of a person weighing 150 lb? (1 lb = 454 g)

How much energy must be expended by a cell to transport 1 mole of sodium ions across a membrane with an electrochemical potential of 62 mV in order to maintain this potential?

How many oxygen atoms would be required to form an ionic compound with aluminum?

Rubidium and Cesium are nonessential elements thought to be retained in the body because of their similarity in size and chemistry to what ion?

In which of the following molecules/ions is nitrogen in the lowest oxidation state?

Which of the following elements would you expect to have the lowest first ionization energy?

Plants convert nitrate into ammonia by using enzymes called

The release of radioactive cesium-137 into the environment by the nuclear accident at Chernobyl produced a health hazard because cesium ions can substitute for _____in plants, making them unsafe for human consumption.

Which of the following elements would you expect to have the greatest first ionization energy?

Which of the following compounds will have the lowest boiling point?

Iodine's role in the human body is very specific.It is incorporated into a hormone, _____, that regulates energy production and use.

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

Transition Metals Biological and Medical Applications

Filters

Exam 22: The Main Group Elements Life and the Periodic Table

Calcium is an example of

Enzymes in plants convert nitrate into ammonia.The unbalanced half-reaction equation is given below.What is the stoichiometric coefficient of the nitrite ion in the balanced reaction equation? NO3 -(aq) + H2O(l) + e- →\rightarrow→ NO2 + (aq) ++OH-(aq)

ATP is an example of a molecule containing a phosphate

Which has the highest boiling point?

The average concentration of calcium in the human body is 15 mg/g of body mass.What is the mass of calcium in the body of a person weighing 150 lb? (1 lb = 454 g)

How much energy must be expended by a cell to transport 1 mole of sodium ions across a membrane with an electrochemical potential of 62 mV in order to maintain this potential?

How many oxygen atoms would be required to form an ionic compound with aluminum?

Rubidium and Cesium are nonessential elements thought to be retained in the body because of their similarity in size and chemistry to what ion?

In which of the following molecules/ions is nitrogen in the lowest oxidation state?

Which of the following elements would you expect to have the lowest first ionization energy?

Plants convert nitrate into ammonia by using enzymes called

The release of radioactive cesium-137 into the environment by the nuclear accident at Chernobyl produced a health hazard because cesium ions can substitute for _____in plants, making them unsafe for human consumption.

Which of the following elements would you expect to have the greatest first ionization energy?

Which of the following compounds will have the lowest boiling point?

Iodine's role in the human body is very specific.It is incorporated into a hormone, _____, that regulates energy production and use.

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

Transition Metals Biological and Medical Applications

Filters

Enzymes in plants convert nitrate into ammonia.The unbalanced half-reaction equation is given below.What is the stoichiometric coefficient of the nitrite ion in the balanced reaction equation? NO₃ -(aq) + H₂O(l) + e^- $\rightarrow$ NO₂ + (aq) ++OH^-(aq)