Question 1

Calculate the mass (in ng)of 2.33 × 1020 atoms of oxygen.

Accepted Answer

A) 6.19 × 106 ng 
B) 1.62 × 107 ng 
C) 2.25 × 103 ng 
D) 3.73 × 106 ng 
E) 4.69 × 107 ng 
A) 6.19 × 106 ng 
B) 1.62 × 107 ng 
C) 2.25 × 103 ng 
D) 3.73 × 106 ng 
E) 4.69 × 107 ng

Question 2

Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu)has an abundance of 48.161%. What is the atomic mass, in amu, of the other isotope?

Accepted Answer

A) 106.905 amu 
B) 106.908 amu 
C) 106.903 amu 
D) 106.911 amu 
A) 106.905 amu 
B) 106.908 amu 
C) 106.903 amu 
D) 106.911 amu

Question 3

How many moles are in 2.16 × 1024 atoms of lead?

Accepted Answer

A) 35.9 moles 
B) 3.59 moles 
C) 0.359 moles 
D) 6.08 moles 
E) 1.79 moles 
A) 35.9 moles 
B) 3.59 moles 
C) 0.359 moles 
D) 6.08 moles 
E) 1.79 moles

Question 4

Determine the number of protons, neutrons, and electrons in the following:

Accepted Answer

A) p+ = 36 n° = 29 e- = 36 
B) p+ = 29 n° = 29 e- = 36 
C) p+ = 36 n° = 36 e- = 29 
D) p+ = 29 n° = 36 e- = 29 
E) p+ = 29 n° = 36 e- = 36 
A) p+ = 36 n° = 29 e- = 36 
B) p+ = 29 n° = 29 e- = 36 
C) p+ = 36 n° = 36 e- = 29 
D) p+ = 29 n° = 36 e- = 29 
E) p+ = 29 n° = 36 e- = 36

Question 5

Which of the following elements is a good conductor of heat and electricity?

Accepted Answer

A) carbon 
B) chlorine 
C) neon 
D) aluminum 
A) carbon 
B) chlorine 
C) neon 
D) aluminum

Question 6

How many electrons are in the ion P3-?

Accepted Answer

A) 12 
B) 18 
C) 28 
D) 34 
A) 12 
B) 18 
C) 28 
D) 34

Question 7

Identify the number of neutrons in P-3. Phosphorus has one stable isotope, phosphorus-31.

Accepted Answer

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

Question 8

When forming an ion, oxygen, O, will normally ________ electron(s).

Accepted Answer

A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two 
A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two

Question 9

Predict the charge that an aluminum ion would have.

Accepted Answer

A) 5- 
B) 1+ 
C) 1- 
D) 2+ 
E) 3+ 
A) 5- 
B) 1+ 
C) 1- 
D) 2+ 
E) 3+

Question 10

When two elements, A and B, form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to?

Accepted Answer

A) Law of definite proportions 
B) Law of the conservation of mass 
C) Law of modern atomic theory 
D) Law of multiple proportions 
E) First law of thermodynamics 
A) Law of definite proportions 
B) Law of the conservation of mass 
C) Law of modern atomic theory 
D) Law of multiple proportions 
E) First law of thermodynamics

Question 11

How many moles of potassium are contained in 449 g of potassium?

Accepted Answer

A) 11.5 moles 
B) 17.6 moles 
C) 69.2 moles 
D) 23.9 moles 
E) 41.5 moles 
A) 11.5 moles 
B) 17.6 moles 
C) 69.2 moles 
D) 23.9 moles 
E) 41.5 moles

Question 12

Describe an atom and what it is made up of according to modern atomic theory.

Accepted Answer

An atom is made up of a nucleus surround

Question 13

How many atoms of chlorine are in 354.53 g of chlorine?

Accepted Answer

A) 6.02214 × 10-23 
B) 6.02214 × 1023 
C) 6.02214 × 1024 
D) 6.02214 × 1025 
E) 6.02214 × 10-24 
A) 6.02214 × 10-23 
B) 6.02214 × 1023 
C) 6.02214 × 1024 
D) 6.02214 × 1025 
E) 6.02214 × 10-24

Question 14

When forming an ion, sodium, Na, will ________ electron(s).

Accepted Answer

A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two 
A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two

Question 15

Cesium belongs to the ________ group of the periodic table.

Accepted Answer

A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas 
A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas

Question 16

What mass of calcium is required to produce 4.2 g of calcium bromide, starting with 3.4 g of bromine?

Accepted Answer

A) 0.4 g 
B) 3.4 g 
C) 4.2 g 
D) 1.6 g 
E) 0.8 g 
A) 0.4 g 
B) 3.4 g 
C) 4.2 g 
D) 1.6 g 
E) 0.8 g

Question 17

If 8.32 g of copper is mixed with 5.2372 × 10-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

Accepted Answer

A) 7.88 × 1022 metal atoms 
B) 3.04 × 10-25 metal atoms 
C) 1.10 × 1023 metal atoms 
D) 3.15 × 1022 metal atoms 
E) 3.15 × 10-22 metal atoms 
A) 7.88 × 1022 metal atoms 
B) 3.04 × 10-25 metal atoms 
C) 1.10 × 1023 metal atoms 
D) 3.15 × 1022 metal atoms 
E) 3.15 × 10-22 metal atoms

Question 18

When forming an ion, rubidium, Rb, will ________ electron(s).

Accepted Answer

A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two 
A) gain one 
B) gain two 
C) gain three 
D) lose one 
E) lose two

Question 19

How many electrons are in the ion Cu2+?

Accepted Answer

A) 27 
B) 29 
C) 31 
D) 64 
A) 27 
B) 29 
C) 31 
D) 64

Question 20

How many moles are in one dozen?

Accepted Answer

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

Exam 2: Atoms and Elements

Calculate the mass (in ng)of 2.33 × 1020 atoms of oxygen.

Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu)has an abundance of 48.161%. What is the atomic mass, in amu, of the other isotope?

How many moles are in 2.16 × 1024 atoms of lead?

Determine the number of protons, neutrons, and electrons in the following:

Which of the following elements is a good conductor of heat and electricity?

How many electrons are in the ion P3-?

Identify the number of neutrons in P-3. Phosphorus has one stable isotope, phosphorus-31.

When forming an ion, oxygen, O, will normally ________ electron(s).

Predict the charge that an aluminum ion would have.

When two elements, A and B, form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to?

How many moles of potassium are contained in 449 g of potassium?

Describe an atom and what it is made up of according to modern atomic theory.

How many atoms of chlorine are in 354.53 g of chlorine?

When forming an ion, sodium, Na, will ________ electron(s).

Cesium belongs to the ________ group of the periodic table.

What mass of calcium is required to produce 4.2 g of calcium bromide, starting with 3.4 g of bromine?

If 8.32 g of copper is mixed with 5.2372 × 10-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

When forming an ion, rubidium, Rb, will ________ electron(s).

How many electrons are in the ion Cu2+?

How many moles are in one dozen?

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

Calculate the mass (in ng)of 2.33 × 10²⁰atoms of oxygen.

How many moles are in 2.16 × 10²⁴ atoms of lead?

How many electrons are in the ion P^3-?

Identify the number of neutrons in P^-3. Phosphorus has one stable isotope, phosphorus-31.

If 8.32 g of copper is mixed with 5.2372 × 10^-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

How many electrons are in the ion Cu²⁺?