Question 1

If 102.7 g of tin is mixed with 10.9 g of copper to create the alloy pewter, how many metal atoms total are present in the pewter?

Accepted Answer

A) 5.81 × 1023 metal atoms 
B) 5.22 × 1023 metal atoms 
C) 3.75 × 1023 metal atoms 
D) 9.66 × 1023 metal atoms 
E) 6.24 × 1023 metal atoms 
A) 5.81 × 1023 metal atoms 
B) 5.22 × 1023 metal atoms 
C) 3.75 × 1023 metal atoms 
D) 9.66 × 1023 metal atoms 
E) 6.24 × 1023 metal atoms

Question 2

Match the following.

-carbon

Accepted Answer

A) Si 
B) Fe 
C) Mg 
D) C 
E) K 
A) Si 
B) Fe 
C) Mg 
D) C 
E) K

Question 3

How many phosphorus atoms are contained in 158 kg of phosphorus?

Accepted Answer

A) 3.07 × 1027 phosphorus atoms 
B) 2.95 × 1027 phosphorus atoms 
C) 3.25 × 1028 phosphorus atoms 
D) 1.18 × 1024 phosphorus atoms 
E) 8.47 × 1024 phosphorus atoms 
A) 3.07 × 1027 phosphorus atoms 
B) 2.95 × 1027 phosphorus atoms 
C) 3.25 × 1028 phosphorus atoms 
D) 1.18 × 1024 phosphorus atoms 
E) 8.47 × 1024 phosphorus atoms

Question 4

Identify the number of protons in P-3.

Accepted Answer

A) 18 
B) 12 
C) 19 
D) 15 
E) 16 
A) 18 
B) 12 
C) 19 
D) 15 
E) 16

Question 5

Why doesn't a mass spectrum of silver have a peak at 107.9 amu?

Accepted Answer

The average atomic mass of sil

Question 6

How many moles of Cs are contained in 595 kg of Cs?

Accepted Answer

A) 2.23 × 102 moles Cs 
B) 4.48 × 103 moles Cs 
C) 7.91 × 104 moles Cs 
D) 1.26 × 103 moles Cs 
E) 5.39 × 102 moles Cs 
A) 2.23 × 102 moles Cs 
B) 4.48 × 103 moles Cs 
C) 7.91 × 104 moles Cs 
D) 1.26 × 103 moles Cs 
E) 5.39 × 102 moles Cs

Question 7

How many dozen are in one mole?

Accepted Answer

A) 12 dozen 
B) 6.0 × 1023 dozen 
C) 2.0 × 10-23 dozen 
D) 5.0 × 1022 dozen 
E) 2.0 × 1023 dozen 
A) 12 dozen 
B) 6.0 × 1023 dozen 
C) 2.0 × 10-23 dozen 
D) 5.0 × 1022 dozen 
E) 2.0 × 1023 dozen

Question 8

What is the average mass, in grams, of one atom of carbon?

Accepted Answer

A) 5.01 × 10-22 g 
B) 5.01 × 1022 g 
C) 1.38 × 10-25 g 
D) 1.99 × 10-23 g 
E) 1.99 × 1023 g 
A) 5.01 × 10-22 g 
B) 5.01 × 1022 g 
C) 1.38 × 10-25 g 
D) 1.99 × 10-23 g 
E) 1.99 × 1023 g

Question 9

Calculate the mass (in kg)of 4.87 × 1025 atoms of Zn.

Accepted Answer

A) 5.29 kg 
B) 1.89 kg 
C) 8.09 kg 
D) 1.24 kg 
E) 1.09 kg 
A) 5.29 kg 
B) 1.89 kg 
C) 8.09 kg 
D) 1.24 kg 
E) 1.09 kg

Question 10

Calculate the atomic mass of gallium if gallium has four naturally occurring isotopes with the following masses and natural abundances:
 Ga-69 68.9256 amu 60.11%
Ga-71 70.9247 amu 39.89%

Accepted Answer

A) 69.72 amu 
B) 69.93 amu 
C) 70.00 amu 
D) 69.80 amu 
E) 70.68 amu 
A) 69.72 amu 
B) 69.93 amu 
C) 70.00 amu 
D) 69.80 amu 
E) 70.68 amu

Question 11

If 102.7 g of tin is mixed with 10.9 g of copper to create the alloy pewter, how many moles of metal are present in the pewter?

Accepted Answer

A) 0.9643 mol total 
B) 1.037 mol total 
C) 0.6233 mol total 
D) 1.604 mol total 
E) 0.8675 mol total 
A) 0.9643 mol total 
B) 1.037 mol total 
C) 0.6233 mol total 
D) 1.604 mol total 
E) 0.8675 mol total

Question 12

Cerium has four stable isotopes listed below. If the weighted average atomic mass of cerium is 140.116 amu, calculate the atomic mass of cerium-142. 
Ce-136 135.90714 amu 0.19%
Ce-138 137.90599 amu 0.25%
Ce-140 139.90543 amu 88.43%
Ce-142 11.13%

Accepted Answer

A) 141.911 amu 
B) 142.341 amu 
C) 142.000 amu 
D) 141.556 amu 
E) 142.911 amu 
A) 141.911 amu 
B) 142.341 amu 
C) 142.000 amu 
D) 141.556 amu 
E) 142.911 amu

Question 13

Which of the following is a transition element?

Accepted Answer

A) Pd 
B) Sn 
C) K 
D) U 
E) Pr 
A) Pd 
B) Sn 
C) K 
D) U 
E) Pr

Question 14

Give the name of the element whose symbol is Na.

Accepted Answer

The answer of Give the name of the element whose...

Question 15

Semiconductors are

Accepted Answer

A) metalloids. 
B) noble gases. 
C) nonmetals. 
D) metals. 
A) metalloids. 
B) noble gases. 
C) nonmetals. 
D) metals.

Question 16

The mass number is equal to

Accepted Answer

A) the sum of the number of the electrons and protons. 
B) the sum of the number of the neutrons and electrons. 
C) the sum of the number of protons, neutrons, and electrons. 
D) the sum of the number of protons and neutrons. 
A) the sum of the number of the electrons and protons. 
B) the sum of the number of the neutrons and electrons. 
C) the sum of the number of protons, neutrons, and electrons. 
D) the sum of the number of protons and neutrons.

Question 17

How many electrons are in a neutral atom of bromine-81?

Accepted Answer

A) 1 
B) 35 
C) 36 
D) 81 
A) 1 
B) 35 
C) 36 
D) 81

Question 18

What mass (in kg)does 5.84 moles of titanium (Ti)have?

Accepted Answer

A) 0.352 kg 
B) 0.122 kg 
C) 0.820 kg 
D) 0.280 kg 
E) 0.632 kg 
A) 0.352 kg 
B) 0.122 kg 
C) 0.820 kg 
D) 0.280 kg 
E) 0.632 kg

Question 19

Dalton's atomic theory states

Accepted Answer

A) that all elements have several isotopes. 
B) that matter is composed of small indestructible particles. 
C) that the properties of matter are determined by the properties of atoms. 
D) that energy is neither created nor destroyed during a chemical reaction. 
E) that an atom is predominantly empty space. 
A) that all elements have several isotopes. 
B) that matter is composed of small indestructible particles. 
C) that the properties of matter are determined by the properties of atoms. 
D) that energy is neither created nor destroyed during a chemical reaction. 
E) that an atom is predominantly empty space.

Question 20

The atomic number of an atom of 80Br is ________.

Accepted Answer

A) 115 
B) 35 
C) 45 
D) 73 
E) 80 
A) 115 
B) 35 
C) 45 
D) 73 
E) 80

Exam 2: Atoms and Elements

If 102.7 g of tin is mixed with 10.9 g of copper to create the alloy pewter, how many metal atoms total are present in the pewter?

Match the following. -carbon

How many phosphorus atoms are contained in 158 kg of phosphorus?

Identify the number of protons in P-3.

Why doesn't a mass spectrum of silver have a peak at 107.9 amu?

How many moles of Cs are contained in 595 kg of Cs?

How many dozen are in one mole?

What is the average mass, in grams, of one atom of carbon?

Calculate the mass (in kg)of 4.87 × 1025 atoms of Zn.

Calculate the atomic mass of gallium if gallium has four naturally occurring isotopes with the following masses and natural abundances: Ga-69 68.9256 amu 60.11% Ga-71 70.9247 amu 39.89%

If 102.7 g of tin is mixed with 10.9 g of copper to create the alloy pewter, how many moles of metal are present in the pewter?

Cerium has four stable isotopes listed below. If the weighted average atomic mass of cerium is 140.116 amu, calculate the atomic mass of cerium-142. Ce-136 135.90714 amu 0.19% Ce-138 137.90599 amu 0.25% Ce-140 139.90543 amu 88.43% Ce-142 11.13%

Which of the following is a transition element?

Give the name of the element whose symbol is Na.

Semiconductors are

The mass number is equal to

How many electrons are in a neutral atom of bromine-81?

What mass (in kg)does 5.84 moles of titanium (Ti)have?

Dalton's atomic theory states

The atomic number of an atom of 80Br is ________.

Units of Measurement for Physical and Chemical Change

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

Identify the number of protons in P^-3.

Calculate the mass (in kg)of 4.87 × 10²⁵ atoms of Zn.

The atomic number of an atom of 80_Br is ________.