Question 1

Calculate the molar mass for Mg(ClO4)2.

Accepted Answer

A) 223.21 g mol-1 
B) 123.76 g mol-1 
C) 119.52 g mol-1 
D) 247.52 g mol-1 
E) 75.76 g mol-1 
A) 223.21 g mol-1 
B) 123.76 g mol-1 
C) 119.52 g mol-1 
D) 247.52 g mol-1 
E) 75.76 g mol-1

Question 2

Describe the difference between ionic and molecular compounds.Give an example of each.

Accepted Answer

An ionic compound is formed between a me

Question 3

What is the empirical formula of a substance that contains 2.64 g of C,0.887 g of H,and 3.52 g of O?

Accepted Answer

A) CH4O  
B) C2H4O2 
C) C2H4O3 
D) C3H4O4 
A) CH4O  
B) C2H4O2 
C) C2H4O3 
D) C3H4O4

Question 4

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

Accepted Answer

A) 0.933 g 
B) 10.0 g 
C) 23.3 g 
D) 146 g 
A) 0.933 g 
B) 10.0 g 
C) 23.3 g 
D) 146 g

Question 5

Identify the name for Ca3(PO4)2.

Accepted Answer

A) calcium(III)phosphite 
B) calcium(II)phosphite 
C) calcium phosphate 
D) tricalcium phosphorustetraoxide 
E) calcium phosphite 
A) calcium(III)phosphite 
B) calcium(II)phosphite 
C) calcium phosphate 
D) tricalcium phosphorustetraoxide 
E) calcium phosphite

Question 6

Calculate the mass percent composition of oxygen in Al2(SO4)3.

Accepted Answer

Question 7

Determine the name for aqueous HBr.

Accepted Answer

A) bromic acid 
B) bromous acid 
C) hydrobromous acid 
D) hydrogen bromate 
E) hydrobromic acid 
A) bromic acid 
B) bromous acid 
C) hydrobromous acid 
D) hydrogen bromate 
E) hydrobromic acid

Question 8

In which set do all elements tend to form anions in binary ionic compounds?

Accepted Answer

A) C,S,Pb 
B) K,Fe,Br 
C) Li,Na,K 
D) N,O,I 
A) C,S,Pb 
B) K,Fe,Br 
C) Li,Na,K 
D) N,O,I

Question 9

Give the mass percent of carbon in C14H19NO2.

Accepted Answer

A) 38.89% 
B) 71.46% 
C) 5.17% 
D) 2.78% 
A) 38.89% 
B) 71.46% 
C) 5.17% 
D) 2.78%

Question 10

How many molecules are in 114.86 g of vitamin C,C6H8O6?

Accepted Answer

A) 1.218 × 1028 
B) 3.927 × 1023 
C) 2.546 × 10-24 
D) 2.977 × 1019 
E) 2.977 × 1022 
A) 1.218 × 1028 
B) 3.927 × 1023 
C) 2.546 × 10-24 
D) 2.977 × 1019 
E) 2.977 × 1022

Question 11

Describe the difference between an atomic element and a molecular element.

Accepted Answer

Atomic elements exist in natur

Question 12

The solid compound Na2CO3 contains

Accepted Answer

A) Na+,C4+,and O2- ions. 
B) Na+ and CO3 -2 ions. 
C) Na2+ and CO3 -2 ions. 
D) Na2CO3 molecules. 
A) Na+,C4+,and O2- ions. 
B) Na+ and CO3 -2 ions. 
C) Na2+ and CO3 -2 ions. 
D) Na2CO3 molecules.

Question 13

Identify the formula for chromium(II)nitrate.

Accepted Answer

A) Cr(NO2)3 
B) Cr(NO3)3 
C) Cr(NO3)2 
D) Cr(NO2)2 
E) Cr2NO2 
A) Cr(NO2)3 
B) Cr(NO3)3 
C) Cr(NO3)2 
D) Cr(NO2)2 
E) Cr2NO2

Question 14

Define empirical formula.

Accepted Answer

An empirical formula

Question 15

Why aren't prefixes used in naming ionic compounds?

Accepted Answer

The charges on the ions dictat

Question 16

Identify the correct formula for aluminum sulfate.

Accepted Answer

A) Al2SO4 
B) Al(SO4)3 
C) Al3(SO4)2 
D) Al2(SO4)3 
A) Al2SO4 
B) Al(SO4)3 
C) Al3(SO4)2 
D) Al2(SO4)3

Question 17

Identify an amine.

Accepted Answer

A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH 
A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH

Question 18

How many Fe(II)ions are there in 20.0 g of FeSO4?

Accepted Answer

A) 2.19 × 10-25 iron(II)ions 
B) 7.92 × 1022 iron(II)ions 
C) 4.57 × 1024 iron(II)ions 
D) 1.82 × 1027 iron(II)ions 
A) 2.19 × 10-25 iron(II)ions 
B) 7.92 × 1022 iron(II)ions 
C) 4.57 × 1024 iron(II)ions 
D) 1.82 × 1027 iron(II)ions

Question 19

Which of the following is a formula for the compound iridium(III)bromide tetrahydrate?

Accepted Answer

A) IrBr∙ $\frac{1}{2}$ H2O 
B) IrBr∙4H2O 
C) IrBr3∙4H2O 
D) IBr3∙4H2O 
E) IBr3∙2H2O 
A) IrBr∙ $\frac{1}{2}$ H2O 
B) IrBr∙4H2O 
C) IrBr3∙4H2O 
D) IBr3∙4H2O 
E) IBr3∙2H2O

Question 20

Formic acid,HCOOH,is a major component in ant bites.Calculate the mass,in grams,of 3.14 × 1023 molecules of formic acid.

Accepted Answer

A) 0.0113 g 
B) 0.0417 g 
C) 24.0 g 
D) 11.3 g 
E) 0.0799 g 
A) 0.0113 g 
B) 0.0417 g 
C) 24.0 g 
D) 11.3 g 
E) 0.0799 g

Exam 3: Molecules,compounds,and Nomenclature

Calculate the molar mass for Mg(ClO4)2.

Describe the difference between ionic and molecular compounds.Give an example of each.

What is the empirical formula of a substance that contains 2.64 g of C,0.887 g of H,and 3.52 g of O?

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

Identify the name for Ca3(PO4)2.

Calculate the mass percent composition of oxygen in Al2(SO4)3.

Determine the name for aqueous HBr.

In which set do all elements tend to form anions in binary ionic compounds?

Give the mass percent of carbon in C14H19NO2.

How many molecules are in 114.86 g of vitamin C,C6H8O6?

Describe the difference between an atomic element and a molecular element.

The solid compound Na2CO3 contains

Identify the formula for chromium(II)nitrate.

Define empirical formula.

Why aren't prefixes used in naming ionic compounds?

Identify the correct formula for aluminum sulfate.

Identify an amine.

How many Fe(II)ions are there in 20.0 g of FeSO4?

Which of the following is a formula for the compound iridium(III)bromide tetrahydrate?

Formic acid,HCOOH,is a major component in ant bites.Calculate the mass,in grams,of 3.14 × 1023 molecules of formic acid.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Calculate the molar mass for Mg(ClO₄)₂.

What mass of phosphorus pentafluoride,PF₅,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

Identify the name for Ca₃(PO₄)₂.

Calculate the mass percent composition of oxygen in Al₂(SO₄)₃.

Give the mass percent of carbon in C₁₄H₁₉NO₂.

How many molecules are in 114.86 g of vitamin C,C₆H₈O₆?

The solid compound Na₂CO₃ contains

How many Fe(II)ions are there in 20.0 g of FeSO₄?

Formic acid,HCOOH,is a major component in ant bites.Calculate the mass,in grams,of 3.14 × 10²³molecules of formic acid.