Question 1

Which scientist is incorrectly matched with his idea or theory?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 2

Analysis of a silicon dioxide (SiO2)sample indicated it contained 46.75 g of silicon and 53.25 g of oxygen. Determine the mass of silicon in a sample of SiO2 if the mass of oxygen is 21.3 g.

Accepted Answer

A) 116.9 g 
B) 24.26 
C) 18.7 g 
D) 9.70 g 
E) 2.67 g 
A) 116.9 g 
B) 24.26 
C) 18.7 g 
D) 9.70 g 
E) 2.67 g

Question 3

Which of these statements is not consistent with Dalton's Atomic Theory?

Accepted Answer

A) All atoms of gold have the same chemical properties. 
B) Electrons are equally distributed throughout an atom. 
C) The properties of sodium are different from the properties of chlorine. 
D) Compounds are formed when atoms combine in simple whole number ratios. 
E) Atoms are rearranged in normal chemical reactions but are neither created nor destroyed. 
A) All atoms of gold have the same chemical properties. 
B) Electrons are equally distributed throughout an atom. 
C) The properties of sodium are different from the properties of chlorine. 
D) Compounds are formed when atoms combine in simple whole number ratios. 
E) Atoms are rearranged in normal chemical reactions but are neither created nor destroyed.

Question 4

Which scientist is incorrectly matched with his idea or theory?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 5

Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 3.2 g of methane react with 12.8 g of oxygen to produce 8.8 g of carbon dioxide?

Accepted Answer

A) 7.2 g 
B) 8.8 g 
C) 9.6 g 
D) 14.8 g 
E) 16.0 g 
A) 7.2 g 
B) 8.8 g 
C) 9.6 g 
D) 14.8 g 
E) 16.0 g

Question 6

Which of the following statements does not describe a chemical compound?.

Accepted Answer

A) It contains two or more elements. 
B) It is a pure substance. 
C) It has a fixed composition. 
D) It has a variable composition. 
E) All of the statements are correct. 
A) It contains two or more elements. 
B) It is a pure substance. 
C) It has a fixed composition. 
D) It has a variable composition. 
E) All of the statements are correct.

Question 7

If 12.0 g of carbon react with 32.0 g of oxygen to form 44.0 g of carbon dioxide, which of these statements is false?

Accepted Answer

A) 18.0 g of carbon will be needed to form 66.0 g of carbon dioxide. 
B) 48.0 g of oxygen will be needed to form 66.0 g of carbon dioxide. 
C) 48.0 g of carbon will be needed to form 132.0 g of carbon dioxide. 
D) 96.0 g of oxygen will be needed to form 132.0 g of carbon dioxide. 
E) None of the above are false. 
A) 18.0 g of carbon will be needed to form 66.0 g of carbon dioxide. 
B) 48.0 g of oxygen will be needed to form 66.0 g of carbon dioxide. 
C) 48.0 g of carbon will be needed to form 132.0 g of carbon dioxide. 
D) 96.0 g of oxygen will be needed to form 132.0 g of carbon dioxide. 
E) None of the above are false.

Question 8

What does the figure represent?
​

Accepted Answer

A) A heterogeneous mixture of elements. 
B) A pure substance which is an element. 
C) A pure substance which is a compound. 
D) A homogenous mixture of elements and compounds. 
E) A heterogeneous mixture of elements and compounds. 
A) A heterogeneous mixture of elements. 
B) A pure substance which is an element. 
C) A pure substance which is a compound. 
D) A homogenous mixture of elements and compounds. 
E) A heterogeneous mixture of elements and compounds.

Question 9

The scientific revolution of the 1500s was marked by a move away from ____ and towards ____ as a method for explaining the natural world.

Accepted Answer

A) law, theory 
B) alchemy, research 
C) reason, observation 
D) scientific theory, experimentation 
E) Both a and c are correct. 
A) law, theory 
B) alchemy, research 
C) reason, observation 
D) scientific theory, experimentation 
E) Both a and c are correct.

Question 10

Which of these is the best definition of matter?

Accepted Answer

A) The pull of gravity on an object. 
B) Anything that has weight and volume. 
C) Anything that has mass and occupies space. 
D) Anything that is directly proportional to weight. 
E) The measure of the amount of space an object occupies. 
A) The pull of gravity on an object. 
B) Anything that has weight and volume. 
C) Anything that has mass and occupies space. 
D) Anything that is directly proportional to weight. 
E) The measure of the amount of space an object occupies.

Question 11

Which of the following is a characteristic of the nucleus of an atom?

Accepted Answer

A) It is positively charged. 
B) It accounts for most of the mass of the atom. 
C) It accounts for most of the volume of the atom. 
D) Both B + C are correct. 
E) Both A + B are correct. 
A) It is positively charged. 
B) It accounts for most of the mass of the atom. 
C) It accounts for most of the volume of the atom. 
D) Both B + C are correct. 
E) Both A + B are correct.

Question 12

10.00 g of the chemical compound benzene (C6H6)contains 0.77 g of hydrogen and 9.23 g of carbon. What mass of benzene will contain 10.00 g of hydrogen?

Accepted Answer

A) 129.9 g 
B) 0.77 g 
C) 92.3 g 
D) 77.0 g 
E) None of these. 
A) 129.9 g 
B) 0.77 g 
C) 92.3 g 
D) 77.0 g 
E) None of these.

Question 13

Based on Rutherford's model of the atom, how many protons would be found in an atom with 17 electrons?

Accepted Answer

A) 1 
B) 7 
C) 12 
D) 17 
E) 34 
A) 1 
B) 7 
C) 12 
D) 17 
E) 34

Question 14

Based on Rutherford's model of the atom, how many electrons would be found in an atom with 7 protons?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 7 
E) 14 
A) 1 
B) 2 
C) 4 
D) 7 
E) 14

Question 15

Which of these contributions did Alchemists of the Middle Ages make to modern science?

Accepted Answer

A) Sun centered universe and metallurgy 
B) Metallurgy and development of scientific techniques 
C) Scientific method and the Law of Conservation of Mass 
D) Law of Conservation of Matter and The First Atomic Theory 
E) Law of Conservation of Mass and the Law of Constant Composition 
A) Sun centered universe and metallurgy 
B) Metallurgy and development of scientific techniques 
C) Scientific method and the Law of Conservation of Mass 
D) Law of Conservation of Matter and The First Atomic Theory 
E) Law of Conservation of Mass and the Law of Constant Composition

Question 16

Which scientist is responsible for establishing the Law of Conservation of Mass?

Accepted Answer

A) Bohr 
B) Proust 
C) Dalton 
D) Lavoisier 
E) Galileo 
A) Bohr 
B) Proust 
C) Dalton 
D) Lavoisier 
E) Galileo

Question 17

A(n)____ is an explanation of a scientific observation.

Accepted Answer

A) law 
B) theory 
C) conclusion 
D) prediction 
E) epiphany 
A) law 
B) theory 
C) conclusion 
D) prediction 
E) epiphany

Question 18

Which of these substances are compounds?
I.Neon
II.Crude oil
III.Water
IV.Sodium chloride

Accepted Answer

A) I 
B) I, and III 
C) II, III, and IV 
D) III and IV 
E) II and IV 
A) I 
B) I, and III 
C) II, III, and IV 
D) III and IV 
E) II and IV

Question 19

The predecessor to chemistry is known as ____.

Accepted Answer

A) alchemy 
B) pre-chemistry 
C) biology 
D) biochemistry 
E) physical science 
A) alchemy 
B) pre-chemistry 
C) biology 
D) biochemistry 
E) physical science

Question 20

Which law best illustrates the following statement? Regardless of the amount of fluorine available, 23 g of sodium always combines with 19 g of fluorine.

Accepted Answer

A) Law of Constant Composition 
B) Law of Conservation of Mass 
C) Dalton's Atomic Theory 
D) Law of Mass Action 
E) Lavoisier's Law 
A) Law of Constant Composition 
B) Law of Conservation of Mass 
C) Dalton's Atomic Theory 
D) Law of Mass Action 
E) Lavoisier's Law

Which scientist is incorrectly matched with his idea or theory?

Analysis of a silicon dioxide (SiO₂)sample indicated it contained 46.75 g of silicon and 53.25 g of oxygen. Determine the mass of silicon in a sample of SiO₂ if the mass of oxygen is 21.3 g.

Which of these statements is not consistent with Dalton's Atomic Theory?

Which scientist is incorrectly matched with his idea or theory?

Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 3.2 g of methane react with 12.8 g of oxygen to produce 8.8 g of carbon dioxide?

Which of the following statements does not describe a chemical compound?.

If 12.0 g of carbon react with 32.0 g of oxygen to form 44.0 g of carbon dioxide, which of these statements is false?

What does the figure represent?

The scientific revolution of the 1500s was marked by a move away from and towards as a method for explaining the natural world.

Which of these is the best definition of matter?

Which of the following is a characteristic of the nucleus of an atom?

10.00 g of the chemical compound benzene (C₆H₆)contains 0.77 g of hydrogen and 9.23 g of carbon. What mass of benzene will contain 10.00 g of hydrogen?

Based on Rutherford's model of the atom, how many protons would be found in an atom with 17 electrons?

Based on Rutherford's model of the atom, how many electrons would be found in an atom with 7 protons?

Which of these contributions did Alchemists of the Middle Ages make to modern science?

Which scientist is responsible for establishing the Law of Conservation of Mass?

A(n)____ is an explanation of a scientific observation.

Which of these substances are compounds? I.Neon II.Crude oil III.Water IV.Sodium chloride

The predecessor to chemistry is known as ____.

Which law best illustrates the following statement? Regardless of the amount of fluorine available, 23 g of sodium always combines with 19 g of fluorine.

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Exam 1: Molecular Reasons

Which scientist is incorrectly matched with his idea or theory?

Analysis of a silicon dioxide (SiO2)sample indicated it contained 46.75 g of silicon and 53.25 g of oxygen. Determine the mass of silicon in a sample of SiO2 if the mass of oxygen is 21.3 g.

Which of these statements is not consistent with Dalton's Atomic Theory?

Which scientist is incorrectly matched with his idea or theory?

Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 3.2 g of methane react with 12.8 g of oxygen to produce 8.8 g of carbon dioxide?

Which of the following statements does not describe a chemical compound?.

If 12.0 g of carbon react with 32.0 g of oxygen to form 44.0 g of carbon dioxide, which of these statements is false?

What does the figure represent? ​

The scientific revolution of the 1500s was marked by a move away from ____ and towards ____ as a method for explaining the natural world.

Which of these is the best definition of matter?

Which of the following is a characteristic of the nucleus of an atom?

10.00 g of the chemical compound benzene (C6H6)contains 0.77 g of hydrogen and 9.23 g of carbon. What mass of benzene will contain 10.00 g of hydrogen?

Based on Rutherford's model of the atom, how many protons would be found in an atom with 17 electrons?

Based on Rutherford's model of the atom, how many electrons would be found in an atom with 7 protons?

Which of these contributions did Alchemists of the Middle Ages make to modern science?

Which scientist is responsible for establishing the Law of Conservation of Mass?

A(n)____ is an explanation of a scientific observation.

Which of these substances are compounds? I.Neon II.Crude oil III.Water IV.Sodium chloride

The predecessor to chemistry is known as ____.

Which law best illustrates the following statement? Regardless of the amount of fluorine available, 23 g of sodium always combines with 19 g of fluorine.

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

Filters

Analysis of a silicon dioxide (SiO₂)sample indicated it contained 46.75 g of silicon and 53.25 g of oxygen. Determine the mass of silicon in a sample of SiO₂ if the mass of oxygen is 21.3 g.

What does the figure represent?

The scientific revolution of the 1500s was marked by a move away from and towards as a method for explaining the natural world.

10.00 g of the chemical compound benzene (C₆H₆)contains 0.77 g of hydrogen and 9.23 g of carbon. What mass of benzene will contain 10.00 g of hydrogen?