Chemical Bonds and Compounds Quiz

Questions and Answers

Which of the statements below concerning chemical bonds is TRUE? (Select all that apply)

All chemical bonds involve the sharing of electrons between two atoms.

An ionic bond occurs when one or more electrons are transferred from a metal atom to a nonmetal atom. (correct)

A covalent bond occurs when one or more electrons are transferred from a metal atom to a nonmetal atom.

An ionic bond occurs when a metal atom and a nonmetal atom share a pair of electrons.

Which of the statements below about benzene is TRUE?

The molecular formula of benzene is C12H12.

The molecular and empirical formulas for benzene are the same.

The empirical formula of benzene is CH. (correct)

The molecular formula of benzene is CH.

What is the correct name for P2O5?

Phosphorus (V) oxide.

Phosphorus (II) oxide.

Phosphorus oxide.

Diphosphorus pentoxide. (correct)

What is the formula mass of calcium nitrate, Ca(NO3)2?

164 g/mol. Signup and view all the answers

What is the mass percent of hydrogen in hydrogen peroxide, H2O2?

5.9%. Signup and view all the answers

What is the coefficient in front of ammonia, NH3, in the balanced equation: N2 (g) + H2 (g) → NH3 (g)?

2 Signup and view all the answers

What is the name for the compound PCl5?

Phosphorus pentachloride Signup and view all the answers

What is the name for the compound B2H6?

Diboron hexahydride Signup and view all the answers

What is the systematic name of Mg(NO3)2?

Magnesium nitrate Signup and view all the answers

What is the systematic name of NH4ClO3?

Ammonium chlorate Signup and view all the answers

What is the systematic name of PbO?

Lead(II) oxide Signup and view all the answers

What is the empirical formula of a compound that is 62.0% C, 10.4% H, and 27.5% O by mass?

C3H6O Signup and view all the answers

What is the formula for copper (II) sulfate pentahydrate?

CuSO4 · 5H2O Signup and view all the answers

Give the name for H2SO4.

Sulfuric acid Signup and view all the answers

Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. The molecular weight is 194.19 g/mol.

C8H10N4O2 Signup and view all the answers

Which of the following contains BOTH ionic and covalent bonds?

BaSO4 Signup and view all the answers

Which of the following would you expect to be a molecule? (Drag and drop)

HCl, CO, and SO Signup and view all the answers

Which of the following would you expect to be part of an ionic solid? (Drag and drop)

KCl, NaI, MgO, KF, and CaS Signup and view all the answers

What is the name of the acid whose formula is HI?

Hydroiodic acid Signup and view all the answers

What is the formula for chlorous acid?

HClO2 Signup and view all the answers

What is the name of the acid whose formula is H2CO3?

Carbonic acid Signup and view all the answers

What is the formula for sulfurous acid?

H2SO3 Signup and view all the answers

Classify each of the following compounds as ionic or molecular: HCN, CCl4, NI3.

Molecular: HCN, CCl4, NI3 Signup and view all the answers

Classify each of the following compounds as ionic or molecular: PtO2, Pb(NO3)2.

Ionic: PtO2, Pb(NO3)2 Signup and view all the answers

Name each of the following molecular compounds: PBr3, XeF8, XeF6, NO.

Part A: Phosphorus tribromide; Part B: Xenon octafluoride; Part C: Xenon hexafluoride; Part D: Nitric oxide Signup and view all the answers

Write a formula for each of the following compounds: astatine monobromide, dichlorine monoxide, dinitrogen trioxide, diboron trioxide.

Part A: AtBr; Part B: Cl2O; Part C: N2O3; Part D: B2O3 Signup and view all the answers

Use the nomenclature flow chart to name the following compound: HNO2(aq).

Nitrous acid Signup and view all the answers

Use the nomenclature flow chart to name the following compound: B2Cl2.

Diboron dichloride Signup and view all the answers

Use the nomenclature flow chart to name the following compound: BaCl2.

Barium chloride Signup and view all the answers

Use the nomenclature flow chart to name the following compound: CrCl3.

Chromium(III) chloride Signup and view all the answers

Write a ratio showing the relationship between the amounts of each element for the following: Part A (a), O:C.

2O:C Signup and view all the answers

Write a ratio showing the relationship between the amounts of each element for the following: Part B (b), H:O.

2H:O Signup and view all the answers

Write a ratio showing the relationship between the amounts of each element for the following: Part C (c), H:O.

2H:O Signup and view all the answers

Study Notes

Chemical Bonds

Ionic bonds form when electrons transfer from a metal to a nonmetal.
Covalent bonds involve the sharing of electron pairs between atoms.

Benzene

Chemical formula: C6H6.
Empirical formula: CH.

Compound Naming

P2O5 is called diphosphorus pentoxide.
Mg(NO3)2 is referred to as magnesium nitrate.
B2H6 is known as diboron hexahydride.
H2SO4 is identified as sulfuric acid.
NH4ClO3 is named ammonium chlorate.
PbO is lead(II) oxide.

Chemical Compositions

Calcium nitrate (Ca(NO3)2) has a formula mass of 164 g/mol.
Hydrogen peroxide (H2O2) has a mass percent of hydrogen equal to 5.9%.
Empirical formula for a compound with 62.0% C, 10.4% H, and 27.5% O is C3H6O.
The molecular formula for a compound with 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen is C8H10N4O2.

Balancing Chemical Equations

In the reaction N2 + H2 → NH3, the coefficient in front of NH3 is 2.

Molecular vs Ionic Compounds

Molecular compounds include: HCl, CO, SO, and phosphorous trichloride.
Ionic compounds include: KCl, NaI, MgO, KF, CaS, barium chloride, potassium iodide, strontium iodide, and aluminum sulfide.

Acids and Their Formulas

HI is known as hydroiodic acid.
Chlorous acid has the formula HClO2.
H2CO3 is called carbonic acid.
Sulfurous acid is represented by H2SO3.

Classification of Compounds

Molecular compounds: HCN, CCl4, NI3.
Ionic compounds: PtO2, Pb(NO3)2.

Naming Molecular Compounds

PBr3 is phosphorus tribromide.
XeF8 is xenon octafluoride.
XeF6 is xenon hexafluoride.
NO is nitric oxide.

Writing Chemical Formulas

Astatine monobromide: AtBr.
Dichlorine monoxide: Cl2O.
Dinitrogen trioxide: N2O3.
Diboron trioxide: B2O3.

Naming Using Nomenclature

HNO2 is nitrous acid.
B2Cl2 is diboron dichloride.
BaCl2 is barium chloride.
CrCl3 is chromium(III) chloride.

Element Ratios

For the given examples, the relationships are:
- Part A: 2O:C.
- Part B: 2H:2O.
- Part C: 2H:O.

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Description

Test your knowledge on chemical bonds, compound naming, and molecular vs ionic compounds. This quiz covers key concepts including ionic and covalent bonds, chemical formulas, and balancing equations. Perfect for chemistry students looking to review their understanding of chemical composition.