Question 1

Which of the following is a metalloid?

Accepted Answer

A) oxygen 
B) hydrogen 
C) silicon 
D) carbon 
E) copper 
A) oxygen 
B) hydrogen 
C) silicon 
D) carbon 
E) copper

Question 2

How many protons are there in the chromium-52 nuclide?

Accepted Answer

A) 29 
B) 76 
C) 23 
D) 24 
E) 28 
A) 29 
B) 76 
C) 23 
D) 24 
E) 28

Question 3

What is the formula for the chlorate of ytterbium(III)?

Accepted Answer

A) Yb(ClO4)2 
B) YbCl2 
C) Yb2(ClO3)3 
D) YbCl3 
E) Yb(ClO3)3 
A) Yb(ClO4)2 
B) YbCl2 
C) Yb2(ClO3)3 
D) YbCl3 
E) Yb(ClO3)3

Question 4

How many oxygen atoms are there in a formula unit of UO2(C2H3O2)2 • NH4C2H3O2 • 5H2O?

Accepted Answer

A) 4 
B) 13 
C) 23 
D) 9 
E) 11 
A) 4 
B) 13 
C) 23 
D) 9 
E) 11

Question 5

A series of silicon-hydrogen compounds with the general formula SinH2n+2 can be represented by the known compounds SiH4,Si2H6,and Si3H8.This best illustrates the law of

Accepted Answer

A) multiple proportions. 
B) conservation of charge. 
C) definite composition. 
D) conservation of mass. 
E) conservation of atoms. 
A) multiple proportions. 
B) conservation of charge. 
C) definite composition. 
D) conservation of mass. 
E) conservation of atoms.

Question 6

Bismuth(III)sulfate is an ionic compound formed from Bi3+ and SO42-.What is the correct way to represent the formula?

Accepted Answer

A) BiSO4+ 
B) Bi(SO4)2- 
C) Bi3+SO42- 
D) Bi2(SO4)3 
E) Bi9(SO4)13.5 
A) BiSO4+ 
B) Bi(SO4)2- 
C) Bi3+SO42- 
D) Bi2(SO4)3 
E) Bi9(SO4)13.5

Question 7

What is the formula for the nitride of europium(III)?

Accepted Answer

A) EuN 
B) Eu2N3 
C) Eu(NO3)2 
D) Eu(NO3)3 
E) Eu(NO2)3 
A) EuN 
B) Eu2N3 
C) Eu(NO3)2 
D) Eu(NO3)3 
E) Eu(NO2)3

Question 8

Ammonia can be made by reaction of water with magnesium nitride:
__ Mg3N2(s)+ __ H2O(l)→ __ Mg(OH)2(s)+ __ NH3(g)
When the equation is properly balanced,the sum of the coefficients is

Accepted Answer

A) 6. 
B) 14. 
C) 12. 
D) 9. 
E) 8. 
A) 6. 
B) 14. 
C) 12. 
D) 9. 
E) 8.

Question 9

A sample of TNT,C7H5N3O6 ,has 8.94 × 1021 nitrogen atoms.How many hydrogen atoms are there in this sample of TNT?

Accepted Answer

A) 1.79 × 1022 
B) 11.92 × 1021 
C) 1.49 × 1022 
D) 8.94 × 1021 
E) 2.09 × 1022 
A) 1.79 × 1022 
B) 11.92 × 1021 
C) 1.49 × 1022 
D) 8.94 × 1021 
E) 2.09 × 1022

Question 10

There are three isotopes of carbon differing with respect to

Accepted Answer

A) electron configuration. 
B) nuclear charge. 
C) number of neutrons. 
D) number of protons. 
E) atomic number. 
A) electron configuration. 
B) nuclear charge. 
C) number of neutrons. 
D) number of protons. 
E) atomic number.

Question 11

The formula for aluminum chloride is

Accepted Answer

A) AlCl3. 
B) AlCl. 
C) Al2Cl. 
D) AlCl4. 
E) AlCl2. 
A) AlCl3. 
B) AlCl. 
C) Al2Cl. 
D) AlCl4. 
E) AlCl2.

Question 12

When the following equation is balanced with lowest whole-number coefficients,what is the coefficient for NO(g)?
___NH3(g)+ ___O2(g)→ ___NO(g)+ ___H2O(g)

Accepted Answer

A) 3 
B) 2 
C) 5 
D) 4 
E) 1 
A) 3 
B) 2 
C) 5 
D) 4 
E) 1

Question 13

The neutral atoms of all the isotopes of the same element have

Accepted Answer

A) different numbers of protons. 
B) the same number of neutrons. 
C) the same number of electrons. 
D) the same mass. 
E) the same mass number. 
A) different numbers of protons. 
B) the same number of neutrons. 
C) the same number of electrons. 
D) the same mass. 
E) the same mass number.

Question 14

What is the ratio of oxygen atoms to hydrogen atoms in the compound Fe4(PO4)3(OH)3 • 12H2O?

Accepted Answer

A) 15:3 
B) 27:15 
C) 27:27 
D) 18:27 
E) 25:17 
A) 15:3 
B) 27:15 
C) 27:27 
D) 18:27 
E) 25:17

Question 15

_____ are very light,negatively charged particles that exists in the region around an atom's positively charged nucleus.

Accepted Answer

A) ​Protons 
B) ​Electrons 
C) ​Bosons 
D) ​Positrons 
E) ​Neutrons 
A) ​Protons 
B) ​Electrons 
C) ​Bosons 
D) ​Positrons 
E) ​Neutrons

Question 16

The species that has the same number of neutrons as   is

Accepted Answer

A)    . 
B)    . 
C)    . 
D)    . 
E)    . 
A)    . 
B)    . 
C)    . 
D)    . 
E)    .

Question 17

Chemical reactions between nonmetals and nonmetals primarily involve

Accepted Answer

A) sharing of electrons. 
B) interactions between protons. 
C) transfer of electrons. 
D) interactions among protons,electrons,and neutrons. 
E) interactions between protons and electrons. 
A) sharing of electrons. 
B) interactions between protons. 
C) transfer of electrons. 
D) interactions among protons,electrons,and neutrons. 
E) interactions between protons and electrons.

Question 18

The products of the combustion of acetaldehyde with oxygen are shown in the following equation:
__ CH3CHO + __ O2 → __ CO2 + __ H2O
When properly balanced,the equation indicates that ____ molecules of O2 are required to burn 2 molecules of CH3CHO.

Accepted Answer

A) 2 
B) 6 
C) 4 
D) 3 
E) 5 
A) 2 
B) 6 
C) 4 
D) 3 
E) 5

Question 19

How many of the following statements are true concerning chemical equations?
I.Coefficients can be fractions.
II.Subscripts can be fractions.
III.Coefficients represent the relative masses of the reactants and/or products.
IV.Changing the subscripts to balance an equation can be done only once.
V.Atoms are conserved when balancing chemical equations.

Accepted Answer

A) 3 
B) 4 
C) 2 
D) 5 
E) 1 
A) 3 
B) 4 
C) 2 
D) 5 
E) 1

Question 20

The formula of calcium sulfide is

Accepted Answer

A) CaS. 
B) CaSO2. 
C) CaSO3. 
D) CaSO4. 
E) Ca(SO4)2. 
A) CaS. 
B) CaSO2. 
C) CaSO3. 
D) CaSO4. 
E) Ca(SO4)2.

Exam 2: Atoms, molecules, and Ions

Which of the following is a metalloid?

How many protons are there in the chromium-52 nuclide?

What is the formula for the chlorate of ytterbium(III)?

How many oxygen atoms are there in a formula unit of UO2(C2H3O2)2 • NH4C2H3O2 • 5H2O?

A series of silicon-hydrogen compounds with the general formula SinH2n+2 can be represented by the known compounds SiH4,Si2H6,and Si3H8.This best illustrates the law of

Bismuth(III)sulfate is an ionic compound formed from Bi3+ and SO42-.What is the correct way to represent the formula?

What is the formula for the nitride of europium(III)?

Ammonia can be made by reaction of water with magnesium nitride: __ Mg3N2(s)+ __ H2O(l)→ __ Mg(OH)2(s)+ __ NH3(g) When the equation is properly balanced,the sum of the coefficients is

A sample of TNT,C7H5N3O6 ,has 8.94 × 1021 nitrogen atoms.How many hydrogen atoms are there in this sample of TNT?

There are three isotopes of carbon differing with respect to

The formula for aluminum chloride is

When the following equation is balanced with lowest whole-number coefficients,what is the coefficient for NO(g)? ___NH3(g)+ ___O2(g)→ ___NO(g)+ ___H2O(g)

The neutral atoms of all the isotopes of the same element have

What is the ratio of oxygen atoms to hydrogen atoms in the compound Fe4(PO4)3(OH)3 • 12H2O?

_____ are very light,negatively charged particles that exists in the region around an atom's positively charged nucleus.

The species that has the same number of neutrons as is

Chemical reactions between nonmetals and nonmetals primarily involve

The products of the combustion of acetaldehyde with oxygen are shown in the following equation: __ CH3CHO + __ O2 → __ CO2 + __ H2O When properly balanced,the equation indicates that ____ molecules of O2 are required to burn 2 molecules of CH3CHO.

The formula of calcium sulfide is

Chemistry and Measurement

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

How many oxygen atoms are there in a formula unit of UO₂(C₂H₃O₂)₂ • NH₄C₂H₃O₂ • 5H₂O?

A series of silicon-hydrogen compounds with the general formula Si_nH_2n+2 can be represented by the known compounds SiH₄,Si₂H₆,and Si₃H₈.This best illustrates the law of

Bismuth(III)sulfate is an ionic compound formed from Bi³⁺ and SO₄^2-.What is the correct way to represent the formula?

Ammonia can be made by reaction of water with magnesium nitride: Mg₃N₂(s)+ H₂O(l)→ Mg(OH)₂(s)+ NH₃(g) When the equation is properly balanced,the sum of the coefficients is

A sample of TNT,C₇H₅N₃O₆ ,has 8.94 × 10²¹ nitrogen atoms.How many hydrogen atoms are there in this sample of TNT?

When the following equation is balanced with lowest whole-number coefficients,what is the coefficient for NO(g)? _NH₃(g)+ _O₂(g)→ _NO(g)+ _H₂O(g)

What is the ratio of oxygen atoms to hydrogen atoms in the compound Fe₄(PO₄)₃(OH)₃ •12H₂O?

The products of the combustion of acetaldehyde with oxygen are shown in the following equation: CH₃CHO + O₂ → CO₂ + H₂O When properly balanced,the equation indicates that ____ molecules of O₂ are required to burn 2 molecules of CH₃CHO.