Question 1

Identify the crystalline solid.

Accepted Answer

A)  plastic 
B)  glass 
C)  table salt 
D)  water 
E)  bleach 
A)  plastic 
B)  glass 
C)  table salt 
D)  water 
E)  bleach C

Question 2

How many iron atoms are contained in 354 g of iron?

Accepted Answer

A)  2.62 × 1025 Fe atoms 
B)  2.13 × 1026 Fe atoms 
C)  4.69 × 1024 Fe atoms 
D)  3.82 × 1024 Fe atoms 
E)  9.50 × 1022 Fe atoms 
A)  2.62 × 1025 Fe atoms 
B)  2.13 × 1026 Fe atoms 
C)  4.69 × 1024 Fe atoms 
D)  3.82 × 1024 Fe atoms 
E)  9.50 × 1022 Fe atoms D

Question 3

Identify the chemical symbol of element Q in   Q.

Accepted Answer

A)  Ar 
B)  F 
C)  Ne 
D)  O 
A)  Ar 
B)  F 
C)  Ne 
D)  O D

Question 4

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

Accepted Answer

A)  p+ = 12 n° = 25 e- = 12 
B)  p+ = 12 n° = 12 e- = 13 
C)  p+ = 12 n° = 13 e- = 12 
D)  p+ = 25 n° = 12 e- = 13 
E)  p+ = 12 n° = 13 e- = 25 
A)  p+ = 12 n° = 25 e- = 12 
B)  p+ = 12 n° = 12 e- = 13 
C)  p+ = 12 n° = 13 e- = 12 
D)  p+ = 25 n° = 12 e- = 13 
E)  p+ = 12 n° = 13 e- = 25

Question 5

Which of the following represents a hypothesis?

Accepted Answer

A)  Sodium reacts with water to form sodium hydroxide and hydrogen gas. 
B)  Nitrogen gas is a fairly inert substance. 
C)  Nickel has a silvery sheen. 
D)  When a substance combusts, it combines with air. 
E)  When wood burns, heat is given off. 
A)  Sodium reacts with water to form sodium hydroxide and hydrogen gas. 
B)  Nitrogen gas is a fairly inert substance. 
C)  Nickel has a silvery sheen. 
D)  When a substance combusts, it combines with air. 
E)  When wood burns, heat is given off.

Question 6

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

Accepted Answer

The answer of Give the name of the instrument that...

Question 7

Silver has an atomic mass of 107.868 amu.The Ag-109 isotope (108.905 amu)is 48.161%.What is the 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 8

How many moles of potassium are contained in 150 g of potassium?

Accepted Answer

A)  3.83 moles 
B)  0.720 moles 
C)  10.0 moles 
D)  7.90 moles 
E)  4.85 moles 
A)  3.83 moles 
B)  0.720 moles 
C)  10.0 moles 
D)  7.90 moles 
E)  4.85 moles

Question 9

Give the symbol for magnesium.

Accepted Answer

A)  Mg 
B)  Mn 
C)  Ma 
D)  Mag 
E)  Me 
A)  Mg 
B)  Mn 
C)  Ma 
D)  Mag 
E)  Me

Question 10

The atomic number of an atom of 13C is

Accepted Answer

A)  19 
B)  6 
C)  7 
D)  9 
E)  13 
A)  19 
B)  6 
C)  7 
D)  9 
E)  13

Question 11

How many magnesium atoms are contained in 3.75 moles of magnesium?

Accepted Answer

A)  1.23 × 1024 magnesium atoms 
B)  2.26 × 1024 magnesium atoms 
C)  1.61 × 1023 magnesium atoms 
D)  5.48 × 1025 magnesium atoms 
E)  6.50 × 1025 magnesium atoms 
A)  1.23 × 1024 magnesium atoms 
B)  2.26 × 1024 magnesium atoms 
C)  1.61 × 1023 magnesium atoms 
D)  5.48 × 1025 magnesium atoms 
E)  6.50 × 1025 magnesium atoms

Question 12

The Scientific Method

Accepted Answer

A)  is just a theory. 
B)  is a strict set of rules and procedures that lead to inarguable fact. 
C)  isn't used much in modern chemistry. 
D)  is based on continued observation and experiment. 
E)  is a framework for proving an argument you know to be true. 
A)  is just a theory. 
B)  is a strict set of rules and procedures that lead to inarguable fact. 
C)  isn't used much in modern chemistry. 
D)  is based on continued observation and experiment. 
E)  is a framework for proving an argument you know to be true.

Question 13

Which of the following contains the fewest atoms? You shouldn't need to do a calculation here.

Accepted Answer

A)  10.0 g Mg 
B)  10.0 g Li 
C)  10.0 g Ca 
D)  10.0 g Rb 
E)  10.0 g Cs 
A)  10.0 g Mg 
B)  10.0 g Li 
C)  10.0 g Ca 
D)  10.0 g Rb 
E)  10.0 g Cs

Question 14

How many atoms are in 2.50 moles of SiO2?

Accepted Answer

A)  4.52 × 1024 atoms 
B)  1.52 × 1024 atoms 
C)  5.02 × 1023 atoms 
D)  3.01 × 1024 atoms 
E)  7.53 × 1023 atoms 
A)  4.52 × 1024 atoms 
B)  1.52 × 1024 atoms 
C)  5.02 × 1023 atoms 
D)  3.01 × 1024 atoms 
E)  7.53 × 1023 atoms

Question 15

an atom that has lost an electron is

Accepted Answer

A)  a cation. 
B)  unlikely to be found in homogeneous mixtures. 
C)  electrically neutral. 
D)  likely to behave exactly like the parent atom. 
E)  an anion. 
A)  a cation. 
B)  unlikely to be found in homogeneous mixtures. 
C)  electrically neutral. 
D)  likely to behave exactly like the parent atom. 
E)  an anion.

Question 16

Calculate the mass (in g)of 2.0 × 1024 atoms of Hg.

Accepted Answer

A)  3.9 × 102 g 
B)  2.4 × 102 g 
C)  3.2 × 102 g 
D)  1.5 × 102 g 
E)  6.5 × 102 g 
A)  3.9 × 102 g 
B)  2.4 × 102 g 
C)  3.2 × 102 g 
D)  1.5 × 102 g 
E)  6.5 × 102 g

Question 17

Identify the largest atom or ion of carbon.

Accepted Answer

A)  p+ = 6 n° = 6 e- = 6 
B)  p+ = 6 n° = 7 e- = 6 
C)  p+ = 6 n° = 6 e- = 7 
D)  p+ = 6 n° = 6 e- = 5 
A)  p+ = 6 n° = 6 e- = 6 
B)  p+ = 6 n° = 7 e- = 6 
C)  p+ = 6 n° = 6 e- = 7 
D)  p+ = 6 n° = 6 e- = 5

Question 18

Identify a liquid.

Accepted Answer

A)  oxygen 
B)  tin 
C)  salt 
D)  water 
E)  sugar 
A)  oxygen 
B)  tin 
C)  salt 
D)  water 
E)  sugar

Question 19

What species is represented by the following information?
P+ = 17 n° = 18 e- = 18

Accepted Answer

A)  Cl 
B)  Cl- 
C)  Ar 
D)  Ar+ 
E)  Kr 
A)  Cl 
B)  Cl- 
C)  Ar 
D)  Ar+ 
E)  Kr

Question 20

A sample of a compound containing only carbon and oxygen decomposes and produces 24.50g of carbon and 32.59g of oxygen.What is the sample?

Accepted Answer

A)  CO 
B)  CO2 
C)  CO3 
D)  C3O2 
E)  C2O 
A)  CO 
B)  CO2 
C)  CO3 
D)  C3O2 
E)  C2O

Exam 2: Atoms

Identify the crystalline solid.

How many iron atoms are contained in 354 g of iron?

Identify the chemical symbol of element Q in Q.

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

Which of the following represents a hypothesis?

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

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

How many moles of potassium are contained in 150 g of potassium?

Give the symbol for magnesium.

The atomic number of an atom of 13C is

How many magnesium atoms are contained in 3.75 moles of magnesium?

The Scientific Method

Which of the following contains the fewest atoms? You shouldn't need to do a calculation here.

How many atoms are in 2.50 moles of SiO2?

an atom that has lost an electron is

Calculate the mass (in g)of 2.0 × 1024 atoms of Hg.

Identify the largest atom or ion of carbon.

Identify a liquid.

What species is represented by the following information? P+ = 17 n° = 18 e- = 18

A sample of a compound containing only carbon and oxygen decomposes and produces 24.50g of carbon and 32.59g of oxygen.What is the sample?

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

The atomic number of an atom of 13_{C is}

How many atoms are in 2.50 moles of SiO₂?

Calculate the mass (in g)of 2.0 × 10²⁴ atoms of Hg.

What species is represented by the following information? P⁺ = 17 n° = 18 e^- = 18