Question 1

How many xenon atoms are contained in 2.36 moles of xenon?

Accepted Answer

A)  3.92 × 1024 xenon atoms 
B)  2.55 × 1023 xenon atoms 
C)  1.42 × 1024 xenon atoms 
D)  7.91 × 1025 xenon atoms 
E)  1.87 × 1026 xenon atoms 
A)  3.92 × 1024 xenon atoms 
B)  2.55 × 1023 xenon atoms 
C)  1.42 × 1024 xenon atoms 
D)  7.91 × 1025 xenon atoms 
E)  1.87 × 1026 xenon atoms

Question 2

How many protons are in nickel?

Accepted Answer

A)  28 
B)  30 
C)  31 
D)  30.7 
E)  58.7 
A)  28 
B)  30 
C)  31 
D)  30.7 
E)  58.7

Question 3

1.8An atom of 32P contains ________ electrons.

Accepted Answer

A)  32 
B)  47 
C)  17 
D)  27 
E)  15 
A)  32 
B)  47 
C)  17 
D)  27 
E)  15

Question 4

What species is represented by the following information?
P+ = 53 n° = 76 e- = 54

Accepted Answer

A)  Os 
B)  Os- 
C)  I+ 
D)  I 
E)  I- 
A)  Os 
B)  Os- 
C)  I+ 
D)  I 
E)  I-

Question 5

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 6

The mass number of an atom of 25Mg is

Accepted Answer

A)  12 
B)  37 
C)  13 
D)  25 
E)  23 
A)  12 
B)  37 
C)  13 
D)  25 
E)  23

Question 7

What is the element symbol for an atom that has 29 protons and 36 neutrons?

Accepted Answer

A)  Cu 
B)  Kr 
C)  N 
D)  Tb 
A)  Cu 
B)  Kr 
C)  N 
D)  Tb

Question 8

Determine the number of protons,neutrons and electrons in the following.   X

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 9

The statement,"In a chemical reaction,matter is neither created nor destroyed" is called

Accepted Answer

A)  the Law of Conservation of Mass. 
B)  Dalton's Atomic Theory. 
C)  the Scientific Method. 
D)  the Law of Multiple Proportions. 
E)  the Law of Definite Proportions. 
A)  the Law of Conservation of Mass. 
B)  Dalton's Atomic Theory. 
C)  the Scientific Method. 
D)  the Law of Multiple Proportions. 
E)  the Law of Definite Proportions.

Question 10

Calculate the mass (in mg)of 4.82 × 1022 atoms of sodium.

Accepted Answer

A)  3.48 mg 
B)  287 × 103 mg 
C)  287 mg 
D)  1.84 × 103 mg 
E)  1.84 mg 
A)  3.48 mg 
B)  287 × 103 mg 
C)  287 mg 
D)  1.84 × 103 mg 
E)  1.84 mg

Question 11

Determine the number of protons,neutrons and electrons in the following.   X

Accepted Answer

A)  p+ = 18 n° = 18 e- = 22 
B)  p+ = 18 n° = 22 e- = 18 
C)  p+ = 22 n° = 18 e- = 18 
D)  p+ = 18 n° = 22 e- = 40 
E)  p+ = 40 n° = 22 e- = 18 
A)  p+ = 18 n° = 18 e- = 22 
B)  p+ = 18 n° = 22 e- = 18 
C)  p+ = 22 n° = 18 e- = 18 
D)  p+ = 18 n° = 22 e- = 40 
E)  p+ = 40 n° = 22 e- = 18

Question 12

Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances. X-107 106.90509 amu 51.84%
X-109 108.90476 amu 48.46%

Accepted Answer

A)  107.90 amu 
B)  108.00 amu 
C)  107.79 amu 
D)  108.32 amu 
E)  108.19 amu 
A)  107.90 amu 
B)  108.00 amu 
C)  107.79 amu 
D)  108.32 amu 
E)  108.19 amu

Question 13

What does "X" represent in the following symbol?   X

Accepted Answer

A)  protactinium 
B)  zirconium 
C)  mangesium 
D)  xenon 
E)  titanium 
A)  protactinium 
B)  zirconium 
C)  mangesium 
D)  xenon 
E)  titanium

Question 14

Natural gas is an example of

Accepted Answer

A)  a compound. 
B)  an element. 
C)  a heterogeneous mixture. 
D)  a homogeneous mixture. 
A)  a compound. 
B)  an element. 
C)  a heterogeneous mixture. 
D)  a homogeneous mixture.

Question 15

Choose the compound from the list below.

Accepted Answer

A)  sodium 
B)  methanol 
C)  neon 
D)  helium 
E)  lithium 
A)  sodium 
B)  methanol 
C)  neon 
D)  helium 
E)  lithium

Question 16

How many nitrogen atoms are contained in 485 cmol of atomic nitrogen?

Accepted Answer

A)  4.25 × 1022 N atoms 
B)  7.87 × 1025 N atoms 
C)  2.60 × 1023 N atoms 
D)  2.92 × 1024 N atoms 
E)  5.37 × 1026 N atoms 
A)  4.25 × 1022 N atoms 
B)  7.87 × 1025 N atoms 
C)  2.60 × 1023 N atoms 
D)  2.92 × 1024 N atoms 
E)  5.37 × 1026 N atoms

Question 17

What mass (in g)does 7.98 moles of Kr have?

Accepted Answer

A)  668 g 
B)  952 g 
C)  422 g 
D)  480 g 
E)  288 g 
A)  668 g 
B)  952 g 
C)  422 g 
D)  480 g 
E)  288 g

Question 18

How many moles of Kr are contained in 398 mg of Kr?

Accepted Answer

A)  4.75 × 10-3 moles Kr 
B)  33.4 moles Kr 
C)  2.11 × 10-4 moles Kr 
D)  2.99 × 10-3 moles Kr 
E)  1.19 × 10-4 moles Kr 
A)  4.75 × 10-3 moles Kr 
B)  33.4 moles Kr 
C)  2.11 × 10-4 moles Kr 
D)  2.99 × 10-3 moles Kr 
E)  1.19 × 10-4 moles Kr

Question 19

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 20

The atomic mass for cadmium is

Accepted Answer

A)  48 
B)  112.41 
C)  40.08 
D)  20 
A)  48 
B)  112.41 
C)  40.08 
D)  20

Exam 2: Atoms

How many xenon atoms are contained in 2.36 moles of xenon?

How many protons are in nickel?

1.8An atom of 32P contains ________ electrons.

What species is represented by the following information? P+ = 53 n° = 76 e- = 54

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

The mass number of an atom of 25Mg is

What is the element symbol for an atom that has 29 protons and 36 neutrons?

Determine the number of protons,neutrons and electrons in the following. X

The statement,"In a chemical reaction,matter is neither created nor destroyed" is called

Calculate the mass (in mg)of 4.82 × 1022 atoms of sodium.

Determine the number of protons,neutrons and electrons in the following. X

Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances. X-107 106.90509 amu 51.84% X-109 108.90476 amu 48.46%

What does "X" represent in the following symbol? X

Natural gas is an example of

Choose the compound from the list below.

How many nitrogen atoms are contained in 485 cmol of atomic nitrogen?

What mass (in g)does 7.98 moles of Kr have?

How many moles of Kr are contained in 398 mg of Kr?

The mass number is equal to

The atomic mass for cadmium is

Essentials: Units, Measurements, and Problem Solving

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

1.8An atom of 32_{P contains ________ electrons.}

What species is represented by the following information? P⁺ = 53 n° = 76 e^- = 54

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

The mass number of an atom of 25_{Mg is}

Calculate the mass (in mg)of 4.82 × 10²²atoms of sodium.