Question 1

Give the formula for cobalt(II)chlorate dihydrate:

Accepted Answer

A) CoCl2·2H2O 
B) CoClO3(H2O)2 
C) Co(ClO3)2(H2O)2 
D) Co(ClO3)2·2H2O 
E) Co2(ClO3)3·2H2O 
A) CoCl2·2H2O 
B) CoClO3(H2O)2 
C) Co(ClO3)2(H2O)2 
D) Co(ClO3)2·2H2O 
E) Co2(ClO3)3·2H2O

Question 2

An atom of the isotope chlorine-37 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)

Accepted Answer

A) 17 p, 18.45 n, 17 e 
B) 17 p, 20 n, 7 e 
C) 17 p, 20 n, 17 e 
D) 17 p, 37 n, 17 e 
E) 20 p, 17 n, 20 e 
A) 17 p, 18.45 n, 17 e 
B) 17 p, 20 n, 7 e 
C) 17 p, 20 n, 17 e 
D) 17 p, 37 n, 17 e 
E) 20 p, 17 n, 20 e

Question 3

The formula for isopropyl alcohol is sometimes written as (CH3)2CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?

Accepted Answer

Question 4

The mineral manganosite is a compound of manganese-55 and oxygen-16. If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?

Accepted Answer

A) MnO 
B) Mn2O 
C) Mn2O2 
D) MnO2 
E) none of these 
A) MnO 
B) Mn2O 
C) Mn2O2 
D) MnO2 
E) none of these

Question 5

The mineral hausmannite is a compound of manganese-55 and oxygen-16. If 72% of the mass of hausmannite is due to manganese, what is the empirical formula of hausmannite?

Accepted Answer

A) MnO 
B) Mn3O 
C) Mn3O4 
D) Mn4O3 
E) MnO3 
A) MnO 
B) Mn3O 
C) Mn3O4 
D) Mn4O3 
E) MnO3

Question 6

The Stock system name for Mn2O7 is

Accepted Answer

A) dimanganese heptaoxide. 
B) magnesium oxide. 
C) manganese(VII)oxide. 
D) manganese(II)oxide. 
E) manganese(III)oxide. 
A) dimanganese heptaoxide. 
B) magnesium oxide. 
C) manganese(VII)oxide. 
D) manganese(II)oxide. 
E) manganese(III)oxide.

Question 7

Almost all the mass of an atom is concentrated in the nucleus.

Accepted Answer

A) True 
 B)False

Question 8

How many protons and electrons are present in one Br-  ion?

Accepted Answer

A) 35 p, 35 e 
B) 80 p, 81 e 
C) 35 p, 34 e 
D) 35 p, 36 e 
E) 80 p, 34 e 
A) 35 p, 35 e 
B) 80 p, 81 e 
C) 35 p, 34 e 
D) 35 p, 36 e 
E) 80 p, 34 e

Question 9

Name the following binary compound: NaH.

Accepted Answer

The answer of Name the following binary compound: NaH....

Question 10

An empirical formula tell us which elements are present in a compound and gives us the simplest, whole-number ratio of the atoms of these elements in the compound.

Accepted Answer

A) True 
 B)False

Question 11

Two isotopes of an element differ in their

Accepted Answer

A) symbol. 
B) atomic number. 
C) atomic mass. 
D) number of protons. 
E) number of electrons. 
A) symbol. 
B) atomic number. 
C) atomic mass. 
D) number of protons. 
E) number of electrons.

Question 12

Which one of the following is an ion?

Accepted Answer

A) B3+ 
B) NaCl 
C) He 
D) (14
C)  
E) none of the above 
A) B3+ 
B) NaCl 
C) He 
D) (14
C)  
E) none of the above

Question 13

How many protons are there in one atom of magnesium?

Accepted Answer

The answer of How many protons are there in one...

Question 14

Given that the ion ClO3- is named chlorate, what is the ion ClO4- named?

Accepted Answer

A) chloride 
B) chlorite 
C) hypochlorite 
D) perchlorite 
E) perchlorate 
A) chloride 
B) chlorite 
C) hypochlorite 
D) perchlorite 
E) perchlorate

Question 15

Zircon is a mineral with the empirical formula ZrSiO4. If all the zirconium is 90Zr, all the silicon is 28Si, and all the oxygen is 16O, what mass of oxygen is present in 10. g of zircon?

Accepted Answer

A) 0.88 g 
B) 1.2 g 
C) 1.8 g 
D) 3.5 g 
E) 5.4 g 
A) 0.88 g 
B) 1.2 g 
C) 1.8 g 
D) 3.5 g 
E) 5.4 g

Question 16

How many protons are there in one atom of xenon?

Accepted Answer

The answer of How many protons are there in one...

Question 17

In a cathode ray tube

Accepted Answer

A) electrons pass from the anode to the cathode. 
B) electrons pass from the cathode to the anode. 
C) protons pass from the anode to the cathode. 
D) protons pass from the cathode to the anode. 
A) electrons pass from the anode to the cathode. 
B) electrons pass from the cathode to the anode. 
C) protons pass from the anode to the cathode. 
D) protons pass from the cathode to the anode.

Question 18

Write the formula of ammonium chlorate.

Accepted Answer

The answer of Write the formula of ammonium chlorate....

Question 19

The straight chain hydrocarbon that contains six carbon atoms is

Accepted Answer

A) propane. 
B) butane. 
C) pentane. 
D) hexane. 
E) heptane. 
A) propane. 
B) butane. 
C) pentane. 
D) hexane. 
E) heptane.

Question 20

Give the formula of sulfuric acid.

Accepted Answer

The answer of Give the formula of sulfuric acid....

Exam 2: Atoms, Molecules, and Ions

Give the formula for cobalt(II)chlorate dihydrate:

An atom of the isotope chlorine-37 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)

The formula for isopropyl alcohol is sometimes written as (CH3)2CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?

The mineral manganosite is a compound of manganese-55 and oxygen-16. If 77% of the mass of manganosite is due to manganese, what is the empirical formula of manganosite?

The mineral hausmannite is a compound of manganese-55 and oxygen-16. If 72% of the mass of hausmannite is due to manganese, what is the empirical formula of hausmannite?

The Stock system name for Mn2O7 is

Almost all the mass of an atom is concentrated in the nucleus.

How many protons and electrons are present in one Br- ion?

Name the following binary compound: NaH.

An empirical formula tell us which elements are present in a compound and gives us the simplest, whole-number ratio of the atoms of these elements in the compound.

Two isotopes of an element differ in their

Which one of the following is an ion?

How many protons are there in one atom of magnesium?

Given that the ion ClO3- is named chlorate, what is the ion ClO4- named?

Zircon is a mineral with the empirical formula ZrSiO4. If all the zirconium is 90Zr, all the silicon is 28Si, and all the oxygen is 16O, what mass of oxygen is present in 10. g of zircon?

How many protons are there in one atom of xenon?

In a cathode ray tube

Write the formula of ammonium chlorate.

The straight chain hydrocarbon that contains six carbon atoms is

Give the formula of sulfuric acid.

Introduction

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

The formula for isopropyl alcohol is sometimes written as (CH₃)₂CHOH to better indicate how the atoms are connected. How many hydrogen atoms would be contained in 3 dozen isopropyl alcohol molecules?

The Stock system name for Mn₂O₇ is

How many protons and electrons are present in one Br^- ion?

Given that the ion ClO₃^- is named chlorate, what is the ion ClO₄^- named?

Zircon is a mineral with the empirical formula ZrSiO₄. If all the zirconium is ⁹⁰Zr, all the silicon is ²⁸Si, and all the oxygen is ¹⁶O, what mass of oxygen is present in 10. g of zircon?