Question 1

Which of the following statements is true?

Accepted Answer

A) Ions are formed by adding or removing protons or electrons. 
B) Scientists believe that solids are mostly open space. 
C) Heating water with a Bunsen burner results in a 2:1 mixture of hydrogen and oxygen gases. 
D) At least two of the above statements (A-
C) are true. 
E) All of the statements (A-
C) are false. 
A) Ions are formed by adding or removing protons or electrons. 
B) Scientists believe that solids are mostly open space. 
C) Heating water with a Bunsen burner results in a 2:1 mixture of hydrogen and oxygen gases. 
D) At least two of the above statements (A-
C) are true. 
E) All of the statements (A-
C) are false.

Question 2

All of the following are in aqueous solution.Which is incorrectly named?

Accepted Answer

A) HC2H3O2,acetic acid 
B) HBr,bromic acid 
C) H2SO3,sulfurous acid 
D) HNO2,nitrous acid 
E) HClO3,chloric acid 
A) HC2H3O2,acetic acid 
B) HBr,bromic acid 
C) H2SO3,sulfurous acid 
D) HNO2,nitrous acid 
E) HClO3,chloric acid

Question 3

Which of the following pairs is incorrect?

Accepted Answer

A) NH4Br,ammonium bromide 
B) K2CO3,potassium carbonate 
C) BaPO4,barium phosphate 
D) CuCl,copper(I)chloride 
E) MnO2,manganese(IV)oxide 
A) NH4Br,ammonium bromide 
B) K2CO3,potassium carbonate 
C) BaPO4,barium phosphate 
D) CuCl,copper(I)chloride 
E) MnO2,manganese(IV)oxide

Question 4

Which of the following statements are true of uranium-238? I.
Its chemical properties will be exactly like those of uranium-235.
II.
Its mass will be slightly different from that of an atom of uranium-235.
III.
It will contain a different number of protons than an atom of uranium-235.
IV.
It is more plentiful in nature than uranium-235.

Accepted Answer

A) III,IV 
B) I,II,III 
C) I,II,IV 
D) II,III,IV 
E) all of these 
A) III,IV 
B) I,II,III 
C) I,II,IV 
D) II,III,IV 
E) all of these

Question 5

Which one of the following statements about atomic structure is false?

Accepted Answer

A) An atom is mostly empty space. 
B) Almost all of the mass of the atom is concentrated in the nucleus. 
C) The protons and neutrons in the nucleus are very tightly packed. 
D) The number of protons and neutrons is always the same in the neutral atom. 
E) All of the above statements (A-
D) are true. 
A) An atom is mostly empty space. 
B) Almost all of the mass of the atom is concentrated in the nucleus. 
C) The protons and neutrons in the nucleus are very tightly packed. 
D) The number of protons and neutrons is always the same in the neutral atom. 
E) All of the above statements (A-
D) are true.

Question 6

Which of the following pairs can be used to illustrate the law of multiple proportions?

Accepted Answer

A) SO and SO2 
B) CO and CaCO3 
C) H2O and C12H22O11 
D) H2SO4 and H2S 
E) KCl and KClO2 
A) SO and SO2 
B) CO and CaCO3 
C) H2O and C12H22O11 
D) H2SO4 and H2S 
E) KCl and KClO2

Question 7

The element rhenium (Re)exists as two stable isotopes and 18 unstable isotopes.Rhenium-185 has in its nucleus

Accepted Answer

A) 75 protons,75 neutrons 
B) 75 protons,130 neutrons 
C) 130 protons,75 neutrons 
D) 75 protons,110 neutrons 
E) not enough information 
A) 75 protons,75 neutrons 
B) 75 protons,130 neutrons 
C) 130 protons,75 neutrons 
D) 75 protons,110 neutrons 
E) not enough information

Question 8

Name the following compounds:
-SnI2

Accepted Answer

Question 9

How many oxygen atoms are there in one formula unit of Ca3(PO4)2?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) none of these 
A) 2 
B) 4 
C) 6 
D) 8 
E) none of these

Question 10

The correct name for LiCl is

Accepted Answer

A) lithium monochloride 
B) lithium(I)chloride 
C) monolithium chloride 
D) lithium chloride 
E) monolithium monochloride 
A) lithium monochloride 
B) lithium(I)chloride 
C) monolithium chloride 
D) lithium chloride 
E) monolithium monochloride

Question 11

How many atoms (total)are there in one formula unit of Ca3(PO4)2?

Accepted Answer

Question 12

An ion is formed

Accepted Answer

A) By either adding or subtracting protons from the atom. 
B) By either adding or subtracting electrons from the atom 
C) By either adding or subtracting neutrons from the atom. 
D) All of the above are true. 
E) Two of the above are true. 
A) By either adding or subtracting protons from the atom. 
B) By either adding or subtracting electrons from the atom 
C) By either adding or subtracting neutrons from the atom. 
D) All of the above are true. 
E) Two of the above are true.

Question 13

The scientist whose alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge is

Accepted Answer

A) J.J.Thomson 
B) Lord Kelvin 
C) Ernest Rutherford 
D) William Thomson 
E) John Dalton 
A) J.J.Thomson 
B) Lord Kelvin 
C) Ernest Rutherford 
D) William Thomson 
E) John Dalton

Question 14

Which metals form cations with varying positive charges?

Accepted Answer

A) transition metals 
B) Group 1 metals 
C) Group 2 metals 
D) Group 3 metals 
E) metalloids 
A) transition metals 
B) Group 1 metals 
C) Group 2 metals 
D) Group 3 metals 
E) metalloids

Question 15

Which of the following are incorrectly paired?

Accepted Answer

A) K,alkali metal 
B) Ba,alkaline earth metal 
C) O,halogen 
D) Ne,noble gas 
E) Ni,transition metal 
A) K,alkali metal 
B) Ba,alkaline earth metal 
C) O,halogen 
D) Ne,noble gas 
E) Ni,transition metal

Question 16

Name the following compounds:
-Al2(SO4)3

Accepted Answer

Question 17

Explain how Dalton's atomic theory accounts for:
a)the law of conservation of mass
b)the law of definite composition
c)the law of multiple proportion

Accepted Answer

(a)Chemical reactions involve only reorg

Question 18

All of the following are in aqueous solution.Which is incorrectly named?

Accepted Answer

A) H2SO4,sulfuric acid 
B) H2CO3,carbonic acid 
C) H3PO4,phosphoric acid 
D) HCN,cyanic acid 
E) HCl,hydrochloric acid 
A) H2SO4,sulfuric acid 
B) H2CO3,carbonic acid 
C) H3PO4,phosphoric acid 
D) HCN,cyanic acid 
E) HCl,hydrochloric acid

Question 19

Which of the following are incorrectly paired?

Accepted Answer

A) Antimony,Sb 
B) Silicon,Si 
C) Silver,Ag 
D) Argon,Ar 
E) Astatine,As 
A) Antimony,Sb 
B) Silicon,Si 
C) Silver,Ag 
D) Argon,Ar 
E) Astatine,As

Question 20

Name the following compounds:
-NaH

Accepted Answer

The answer of Name the following compounds:
-NaH...

Exam 2: Atoms, molecules, and Ions

Which of the following statements is true?

All of the following are in aqueous solution.Which is incorrectly named?

Which of the following pairs is incorrect?

Which one of the following statements about atomic structure is false?

Which of the following pairs can be used to illustrate the law of multiple proportions?

The element rhenium (Re)exists as two stable isotopes and 18 unstable isotopes.Rhenium-185 has in its nucleus

Name the following compounds: -SnI2

How many oxygen atoms are there in one formula unit of Ca3(PO4)2?

The correct name for LiCl is

How many atoms (total)are there in one formula unit of Ca3(PO4)2?

An ion is formed

The scientist whose alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge is

Which metals form cations with varying positive charges?

Which of the following are incorrectly paired?

Name the following compounds: -Al2(SO4)3

Explain how Dalton's atomic theory accounts for: a)the law of conservation of mass b)the law of definite composition c)the law of multiple proportion

All of the following are in aqueous solution.Which is incorrectly named?

Which of the following are incorrectly paired?

Name the following compounds: -NaH

Chemical Foundations

Stoichiometry

Chemical Reactions and Solutions Stoichiometry

Gases

Thermochemistry

Atomic Structure and Periodicity

Bonding: General Concepts

Covalent Bonding: Orbitals

Liquids and Solids

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex Ion Equilibria

Spontaneity, entropy, and Free Energy

Electrochemistry

The Nucleus: a Chemists View

The Representative Elements

Transition Metals and Coordination Chemistry

Organic and Biological Molecules

Filters

Name the following compounds: -SnI₂

How many oxygen atoms are there in one formula unit of Ca₃(PO₄)₂?

How many atoms (total)are there in one formula unit of Ca₃(PO₄)₂?

Name the following compounds: -Al₂(SO₄)₃