Question 1

What is the empirical formula for Hg2(NO3)2?

Accepted Answer

A)  Hg2(NO3)2 
B)  HgNO3 
C)  Hg(NO3)2 
D)  Hg2NO3 
E)  Hg4(NO3)4 
A)  Hg2(NO3)2 
B)  HgNO3 
C)  Hg(NO3)2 
D)  Hg2NO3 
E)  Hg4(NO3)4

Question 2

Identify the compound with covalent bonds.

Accepted Answer

A)  CH4 
B)  Ar 
C)  LiBr 
D)  Mg 
E)  NaI 
A)  CH4 
B)  Ar 
C)  LiBr 
D)  Mg 
E)  NaI

Question 3

What is the chemical formula for magnesium hydroxide?

Accepted Answer

A)  MgH2 
B)  MgOH 
C)  MgOH2 
D)  Mg(OH)2 
A)  MgH2 
B)  MgOH 
C)  MgOH2 
D)  Mg(OH)2

Question 4

Which of the following contains BOTH ionic and covalent bonds?

Accepted Answer

A)  BaF2 
B)  Cl2 
C)  MgSO4 
D)  SF6 
E)  None of the above contains both ionic and covalent bonds. 
A)  BaF2 
B)  Cl2 
C)  MgSO4 
D)  SF6 
E)  None of the above contains both ionic and covalent bonds.

Question 5

What is the mass of a single iodine molecule,I2?

Accepted Answer

A)  2.107 × 10-22 g 
B)  4.215 × 10-22 g 
C)  126.9 g 
D)  253.8 g 
A)  2.107 × 10-22 g 
B)  4.215 × 10-22 g 
C)  126.9 g 
D)  253.8 g

Question 6

What mass of ethane,C2H6,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl3F?

Accepted Answer

A)  0.0727 g 
B)  0.655 g 
C)  1.52 g 
D)  13.7 g 
A)  0.0727 g 
B)  0.655 g 
C)  1.52 g 
D)  13.7 g

Question 7

Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

Accepted Answer

A)  8.59 mL 
B)  13.5 mL 
C)  7.40 mL 
D)  12.4 mL 
E)  11.6 mL 
A)  8.59 mL 
B)  13.5 mL 
C)  7.40 mL 
D)  12.4 mL 
E)  11.6 mL

Question 8

Calculate the mass percent composition of lithium in Li3PO4.

Accepted Answer

A)  26.75% 
B)  17.98% 
C)  30.72% 
D)  55.27% 
E)  20.82% 
A)  26.75% 
B)  17.98% 
C)  30.72% 
D)  55.27% 
E)  20.82%

Question 9

How many moles of NF3 contain 2.55 × 1024 fluorine atoms?

Accepted Answer

A)  1.41 moles NF3 
B)  4.23 moles NF3 
C)  12.7 moles NF3 
D)  7.87 moles NF3 
E)  2.82 moles NF3 
A)  1.41 moles NF3 
B)  4.23 moles NF3 
C)  12.7 moles NF3 
D)  7.87 moles NF3 
E)  2.82 moles NF3

Question 10

Write a possible molecular formula for C4H4O.

Accepted Answer

A)  C24H24O6 
B)  C12H12O2 
C)  C2H2O 
D)  C8H8O 
A)  C24H24O6 
B)  C12H12O2 
C)  C2H2O 
D)  C8H8O

Question 11

Identify the compound with ionic bonds.

Accepted Answer

A)  Ne 
B)  CO 
C)  N2 
D)  H2O 
E)  KCl 
A)  Ne 
B)  CO 
C)  N2 
D)  H2O 
E)  KCl

Question 12

Match between columns
                        Premises: neon
iodine
hydrogen
chlorine
calcium
oxygen

Accepted Answer

The Answer of IS1U1B12S1U1B0(s) and Ca(s) and NeS1U1B12S1U1B0(g) and Cl(g) is...

Question 13

The solid compound,NaS1U1B12S1U1B0COS1U1B13S1U1B0,contains

Accepted Answer

A)  NaS1U1P1+S1S1P0, CS1U1P14+S1S1P0, and OS1U1P12-S1S1P0 ions. 
B)  NaS1U1P1+S1S1P0 and COS1U1B13S1U1B0S1U1P1-2S1S1P0 ions. 
C)  NaS1U1B12S1U1B0S1U1P1+S1S1P0 and COS1U1B13S1U1B0S1U1P12-S1S1P0 ions. 
D)  NaS1U1B12S1U1B0COS1U1B13S1U1B0 molecules. 
A)  NaS1U1P1+S1S1P0, CS1U1P14+S1S1P0, and OS1U1P12-S1S1P0 ions. 
B)  NaS1U1P1+S1S1P0 and COS1U1B13S1U1B0S1U1P1-2S1S1P0 ions. 
C)  NaS1U1B12S1U1B0S1U1P1+S1S1P0 and COS1U1B13S1U1B0S1U1P12-S1S1P0 ions. 
D)  NaS1U1B12S1U1B0COS1U1B13S1U1B0 molecules.

Question 14

The compound Pb(NO3)2 is named

Accepted Answer

A)  lead nitrate(II). 
B)  lead(I) nitrate. 
C)  lead(I) nitrate(II). 
D)  lead(II) nitrate. 
A)  lead nitrate(II). 
B)  lead(I) nitrate. 
C)  lead(I) nitrate(II). 
D)  lead(II) nitrate.

Question 15

Which of the following is one possible form of pentane?

Accepted Answer

A)  CH3CH2CH2CH2CH3 
B)  CH3CH=CHCH2CH3 
C)  CH3CH2CH2CH2CH2CH2CH3 
D)  CH3CH2CH2CH2CH2OH  
E)  CH3CH2NHCH2CH2CH3 
A)  CH3CH2CH2CH2CH3 
B)  CH3CH=CHCH2CH3 
C)  CH3CH2CH2CH2CH2CH2CH3 
D)  CH3CH2CH2CH2CH2OH  
E)  CH3CH2NHCH2CH2CH3

Question 16

What is the empirical formula of a substance that contains 2.64 g of C,0.444 g of H,and 7.04 g of O?

Accepted Answer

A)  CH2O2 
B)  C2H4O2 
C)  C2H4O3 
D)  C3H4O4 
E)  C4H8O2 
A)  CH2O2 
B)  C2H4O2 
C)  C2H4O3 
D)  C3H4O4 
E)  C4H8O2

Question 17

Determine the empirical formula for a compound that contains C,H and O.It contains 52.14% C and 34.73% O by mass.

Accepted Answer

A)  C2H6O 
B)  CHO 
C)  C4H13O2 
D)  CH4O3 
E)  CH3O 
A)  C2H6O 
B)  CHO 
C)  C4H13O2 
D)  CH4O3 
E)  CH3O

Question 18

The chemical formula for potassium peroxide is

Accepted Answer

A)  KOH. 
B)  KO2. 
C)  K2O. 
D)  K2O2. 
A)  KOH. 
B)  KO2. 
C)  K2O. 
D)  K2O2.

Question 19

What is the chemical formula for strontium hydride?

Accepted Answer

A)  SrH2 
B)  SrOH 
C)  SrOH2 
D)  Sr(OH)2 
A)  SrH2 
B)  SrOH 
C)  SrOH2 
D)  Sr(OH)2

Question 20

What is the empirical formula of a compound that is 48.6% C,8.2% H,and 43.2% O by mass?

Accepted Answer

A)  C3HO2 
B)  C6HO5 
C)  C6H12O4 
D)  C4H8O3 
E)  C3H6O2 
A)  C3HO2 
B)  C6HO5 
C)  C6H12O4 
D)  C4H8O3 
E)  C3H6O2

Exam 3: Molecules,compounds,and Chemical Equations

What is the empirical formula for Hg2(NO3)2?

Identify the compound with covalent bonds.

What is the chemical formula for magnesium hydroxide?

Which of the following contains BOTH ionic and covalent bonds?

What is the mass of a single iodine molecule,I2?

What mass of ethane,C2H6,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl3F?

Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

Calculate the mass percent composition of lithium in Li3PO4.

How many moles of NF3 contain 2.55 × 1024 fluorine atoms?

Write a possible molecular formula for C4H4O.

Identify the compound with ionic bonds.

The solid compound,Na2CO3,contains

The compound Pb(NO3)2 is named

Which of the following is one possible form of pentane?

What is the empirical formula of a substance that contains 2.64 g of C,0.444 g of H,and 7.04 g of O?

Determine the empirical formula for a compound that contains C,H and O.It contains 52.14% C and 34.73% O by mass.

The chemical formula for potassium peroxide is

What is the chemical formula for strontium hydride?

What is the empirical formula of a compound that is 48.6% C,8.2% H,and 43.2% O by mass?

Matter, measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

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,

Liquids,solids,and Intermolecular Forces

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

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What is the empirical formula for Hg₂(NO₃)₂?

What is the mass of a single iodine molecule,I₂?

What mass of ethane,C₂H₆,contains the same number of molecules as 3.00 g of trichlorofluoromethane,CCl₃F?

Determine the volume of hexane that contains 5.33 × 10²² molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

Calculate the mass percent composition of lithium in Li₃PO₄.

How many moles of NF₃ contain 2.55 × 10²⁴ fluorine atoms?

Write a possible molecular formula for C₄H₄O.

The solid compound,Na₂CO₃,contains

The compound Pb(NO₃)₂ is named