Question 1

A solution with a pH of 6 has ________ times ________ OH- than a solution with a pH of 10.

Accepted Answer

A) 40; more 
B) 4000; less 
C) 10,000; less 
D) 4; less 
E) 10,000 more 
A) 40; more 
B) 4000; less 
C) 10,000; less 
D) 4; less 
E) 10,000 more C

Question 2

Which one is NOT one of the properties of water?

Accepted Answer

A) The frozen form is more dense than the liquid form. 
B) Water moderates temperature. 
C) Water is a solvent. 
D) Water has a high heat capacity. 
E) Water has a high heat of evaporation. 
A) The frozen form is more dense than the liquid form. 
B) Water moderates temperature. 
C) Water is a solvent. 
D) Water has a high heat capacity. 
E) Water has a high heat of evaporation. A

Question 3

Draw three water molecules and the hydrogen bonding that may occur between the molecules.Define hydrogen bonding and explain how and why it occurs.

Accepted Answer

The hydrogen bonding is shown as dotted lines between the water molecules.Hydrogen bonding is the weak attraction between a covalently bonded hydrogen atom and an electronegative atom taking part in another covalent bond.It occurs between a partially positive hydrogen in one water molecule and a partially negative oxygen in another water molecule.The hydrogen has a partially positive charge and the oxygen has a partially negative charge because of the unequal sharing of electrons.

Question 4

Which of the following statements is/are true about the pH scale?
-The scale indicates the relative concentrations of hydrogen and hydroxide ions in a solution.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following statements is/are true about the pH scale?
-pH 7 has a balanced level of H+ and OH-.

Accepted Answer

A) True 
 B)False

Question 6

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. 
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.

Question 7

Which of the following statements is/are true about the pH scale?
-Any substance below pH 7 is considered acidic and any substance above pH 7 is considered basic or alkaline.

Accepted Answer

A) True 
 B)False

Question 8

Which statement is NOT true about covalent bonds?

Accepted Answer

A) Covalent bonds form when an electron is completely lost or gained from an atom. 
B) A covalent molecule contains one or more covalent bonds. 
C) A single covalent bond is drawn as a line between two atoms. 
D) A pair of electrons is shared between two atoms for each covalent bond. 
E) Shared electrons allow an atom to complete its valence shell in a covalent molecule. 
A) Covalent bonds form when an electron is completely lost or gained from an atom. 
B) A covalent molecule contains one or more covalent bonds. 
C) A single covalent bond is drawn as a line between two atoms. 
D) A pair of electrons is shared between two atoms for each covalent bond. 
E) Shared electrons allow an atom to complete its valence shell in a covalent molecule.

Question 9

Draw two hydrogen atoms using Bohr's model.Now bond them to form a molecule of hydrogen gas.Write the molecular formula.Explain what type of bond you've created and why this is a stable situation.

Accepted Answer

@#IMG-DLM& The molecular formula is H₂.A nonpolar c

Question 10

Which property of water allows it stick to surfaces like glass?

Accepted Answer

A) adhesion 
B) high heat of evaporation 
C) high heat capacity 
D) Water is a good solvent. 
E) The frozen form is less dense than the liquid form. 
A) adhesion 
B) high heat of evaporation 
C) high heat capacity 
D) Water is a good solvent. 
E) The frozen form is less dense than the liquid form.

Question 11

Both 18O and 16O are found in nature.However,16O is the most common.Therefore,

Accepted Answer

A) these are different elements. 
B) oxygen atoms can have eight or 10 neutrons. 
C) 18O has two additional electrons in its outer shell. 
D) 18O is the form of oxygen that provides living cells with life. 
E) only the common form of 16O can bond with hydrogen atoms to form H2O. 
A) these are different elements. 
B) oxygen atoms can have eight or 10 neutrons. 
C) 18O has two additional electrons in its outer shell. 
D) 18O is the form of oxygen that provides living cells with life. 
E) only the common form of 16O can bond with hydrogen atoms to form H2O.

Question 12

Draw the structural formula of a single water molecule.Note the location of partial positive and negative charges.Label the covalent bonds.

Accepted Answer

@#IMG-DLM& Note the diagrams above.The c

Question 13

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? $$\begin{array} { l l l } 
 \begin{array} { c } 
{ \left[ \mathbf { H } ^ { + } \right] } \
\text {(moles per liter) }
\end{array} & \mathbf { p H } \
0.000001 =  1 \times 10 ^ { - 6 } & 6 \
0.0000001 =  1 \times 10 ^ { - 7 } & 7 \
0.00000001 = 1 \times 10 ^ { - 8 } & 8
\end{array}$$

Accepted Answer

Study of the chart confirms that as pH d

Question 14

Which statement is NOT true about polar covalent bonds?

Accepted Answer

A) When covalent bonds are nonpolar,the electrons are shared fairly equally between the atoms. 
B) Polar covalent bonds are important in the characteristics of water. 
C) Electrons are shared unequally in a polar covalent bond. 
D) The larger atom in a polar bond attracts the electron more strongly than the smaller atom. 
E) The oxygen of a water molecule is electropositive relative to the hydrogen. 
A) When covalent bonds are nonpolar,the electrons are shared fairly equally between the atoms. 
B) Polar covalent bonds are important in the characteristics of water. 
C) Electrons are shared unequally in a polar covalent bond. 
D) The larger atom in a polar bond attracts the electron more strongly than the smaller atom. 
E) The oxygen of a water molecule is electropositive relative to the hydrogen.

Question 15

Which substances are on the basic side of the pH scale?

Accepted Answer

A) baking soda,oven cleaner,and human blood 
B) baking soda,oven cleaner,and urine 
C) tomatoes,oven cleaner,and human blood 
D) beer,vinegar,and black coffee 
E) Great Salt Lake,oven cleaner,and tears 
A) baking soda,oven cleaner,and human blood 
B) baking soda,oven cleaner,and urine 
C) tomatoes,oven cleaner,and human blood 
D) beer,vinegar,and black coffee 
E) Great Salt Lake,oven cleaner,and tears

Question 16

This system of chemicals, $\mathrm { II } _ { 2 } \mathrm { CO } _ { 3 } ? \mathrm { II } ^ { + } + \mathrm { IICO } _ { 3 }^-$ ,act as a buffer in the blood.If hydrogen ions are added to blood which of the following reactions would occur?

Accepted Answer

A)  $\mathrm { H } ^ { + } + \mathrm { HCO } _ { 3 } { } ^ { - } \longrightarrow \mathrm { H } _ { 2 } \mathrm { CO } _ { 3 }$ 
B)  $\mathrm { OH }^- + \mathrm { H } _ { 2 } \mathrm { CO } _ { 3 } \longrightarrow \mathrm { HCO } _ { 3 } { } ^ { - } + \mathrm { H } _ { 2 } \mathrm { O }$ 
A)  $\mathrm { H } ^ { + } + \mathrm { HCO } _ { 3 } { } ^ { - } \longrightarrow \mathrm { H } _ { 2 } \mathrm { CO } _ { 3 }$ 
B)  $\mathrm { OH }^- + \mathrm { H } _ { 2 } \mathrm { CO } _ { 3 } \longrightarrow \mathrm { HCO } _ { 3 } { } ^ { - } + \mathrm { H } _ { 2 } \mathrm { O }$

Question 17

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

@#IMG-DLM& There is an attraction of positively ch

Question 18

The periodic table displays the following information about the element phosphorus: 15
P
30.794
Based on this information,which of the following are true statements about phosphorus? Select all that apply.

Accepted Answer

A) The atomic number of phosphorus is 30.794. 
B) Phosphorus has 15 protons. 
C) Phosphorus has 30.794 electrons. 
D) Phosphorus has a complete valence shell. 
E) Phosphorus will form chemical bonds with other elements. 
A) The atomic number of phosphorus is 30.794. 
B) Phosphorus has 15 protons. 
C) Phosphorus has 30.794 electrons. 
D) Phosphorus has a complete valence shell. 
E) Phosphorus will form chemical bonds with other elements.

Question 19

Following nitrogen (78%)and oxygen (21%),argon is the next most common gas in the atmosphere (less than 1%).Checking the table of elements,you discover that argon is one of a family of atoms with outer shells already full of electrons.How is this related to the fact that these atoms have virtually no biological importance?

Accepted Answer

Argon has an outer shell with

Question 20

An article in a medical journal indicates that researchers have used an isotope 3H to trace a certain metabolic process.From the symbol that is given,we know this is a hydrogen isotope with

Accepted Answer

A) three protons. 
B) three neutrons. 
C) three electrons. 
D) one proton and two neutrons. 
E) two protons and one neutron. 
A) three protons. 
B) three neutrons. 
C) three electrons. 
D) one proton and two neutrons. 
E) two protons and one neutron.

Exam 2: Basic Chemistry

A solution with a pH of 6 has ________ times ________ OH- than a solution with a pH of 10.

Which one is NOT one of the properties of water?

Draw three water molecules and the hydrogen bonding that may occur between the molecules.Define hydrogen bonding and explain how and why it occurs.

Which of the following statements is/are true about the pH scale? -The scale indicates the relative concentrations of hydrogen and hydroxide ions in a solution.

Which of the following statements is/are true about the pH scale? -pH 7 has a balanced level of H+ and OH-.

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

Which of the following statements is/are true about the pH scale? -Any substance below pH 7 is considered acidic and any substance above pH 7 is considered basic or alkaline.

Which statement is NOT true about covalent bonds?

Draw two hydrogen atoms using Bohr's model.Now bond them to form a molecule of hydrogen gas.Write the molecular formula.Explain what type of bond you've created and why this is a stable situation.

Which property of water allows it stick to surfaces like glass?

Both 18O and 16O are found in nature.However,16O is the most common.Therefore,

Draw the structural formula of a single water molecule.Note the location of partial positive and negative charges.Label the covalent bonds.

Which statement is NOT true about polar covalent bonds?

Which substances are on the basic side of the pH scale?

This system of chemicals, II2CO3?II++IICO3−\mathrm { II } _ { 2 } \mathrm { CO } _ { 3 } ? \mathrm { II } ^ { + } + \mathrm { IICO } _ { 3 }^-II2​CO3​?II++IICO3−​ ,act as a buffer in the blood.If hydrogen ions are added to blood which of the following reactions would occur?

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.

The periodic table displays the following information about the element phosphorus: 15 P 30.794 Based on this information,which of the following are true statements about phosphorus? Select all that apply.

An article in a medical journal indicates that researchers have used an isotope 3H to trace a certain metabolic process.From the symbol that is given,we know this is a hydrogen isotope with

A View of Life

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development and Aging

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

A solution with a pH of 6 has times OH^- than a solution with a pH of 10.

Which of the following statements is/are true about the pH scale? -pH 7 has a balanced level of H⁺ and OH^-.

Both ¹⁸O and ¹⁶O are found in nature.However,¹⁶O is the most common.Therefore,

This system of chemicals, $\mathrm { II } _ { 2 } \mathrm { CO } _ { 3 } ? \mathrm { II } ^ { + } + \mathrm { IICO } _ { 3 }^-$ ,act as a buffer in the blood.If hydrogen ions are added to blood which of the following reactions would occur?

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.

An article in a medical journal indicates that researchers have used an isotope ³H to trace a certain metabolic process.From the symbol that is given,we know this is a hydrogen isotope with