Mastering Chemistry 5

Describe the difference between ionic and molecular compounds. -A molecular compound is usually formed between two or more nonmetals, and is held together through the sharing of electrons between atoms. An example is CO2. -An ionic compound is formed between a metal and a nonmetal (or polyatomic ions), and is held together through the attraction of opposite charges. An example is NaCl. -An ionic compound is usually formed between two or more nonmetals, and is held together through the sharing of electrons between atoms. An example is CO2. -An ionic compound is formed between two or more metals, and is held together through the attraction of opposite charges. An example is Na2Al. -A molecular compound is formed between a metal and a nonmetal (or polyatomic ions), and is held together through the attraction of opposite charges. An example is NaCl.

-A molecular compound is usually formed between two or more nonmetals, and is held together through the sharing of electrons between atoms. An example is CO2. -An ionic compound is formed between a metal and a nonmetal (or polyatomic ions), and is held together through the attraction of opposite charges. An example is NaCl.

Describe the difference between a molecular formula and an empirical formula. -A molecular formula gives the actual number of each type of atom necessary to build a specific molecule. An empirical formula is simply the smallest whole number ratio between atoms in a compound. -C2H4 is the molecular formula for ethene. The empirical formula for ethene is CH2, the smallest whole number ratio between the elements. -A molecular formula is simply the smallest whole number ratio between atoms in a compound. An empirical formula gives the actual number of each type of atom necessary to build a specific molecule. -H2O2 is the molecular formula for hydrogen peroxide. The empirical formula for hydrogen peroxide is HO, the smallest whole number ratio between the elements. -H2O2 is the empirical formula for hydrogen peroxide. The molecular formula for hydrogen peroxide is HO, the smallest whole number ratio between the elements.

-A molecular formula gives the actual number of each type of atom necessary to build a specific molecule. An empirical formula is simply the smallest whole number ratio between atoms in a compound. -C2H4 is the molecular formula for ethene. The empirical formula for ethene is CH2, the smallest whole number ratio between the elements. -H2O2 is the molecular formula for hydrogen peroxide. The empirical formula for hydrogen peroxide is HO, the smallest whole number ratio between the elements.

Describe the difference between an atomic element and a molecular element -H, N, and As are some examples of atomic elements. H2, N2, and As4 are some examples of molecular elements. -Molecular elements exist with a single atom as their basic unit. -Atomic elements exist with a single atom as their basic unit. -Atomic elements have more than one atom in their basic unit. -H2, N2, and As4 are some examples of atomic elements. H, N, and As are some examples of molecular elements. -Molecular elements have more than one atom in their basic unit.

-H, N, and As are some examples of atomic elements. H2, N2, and As4 are some examples of molecular elements. -Atomic elements exist with a single atom as their basic unit. -Molecular elements have more than one atom in their basic unit.

Which of the following statements describes a structural formula? -A structural formula gives the relative number of atoms of each element per formula unit. -A structural formula gives the actual number of atoms of each element per formula unit. -A structural formula uses dots to represent ionic bonds and shows how atoms in a molecule connect or bond to each other. -A structural formula uses dots to represent covalent bonds and shows how electrons in a molecule connect or bond to each other. -A structural formula uses lines to represent covalent bonds and shows how atoms in a molecule connect or bond to each other.

A structural formula uses lines to represent covalent bonds and shows how atoms in a molecule connect or bond to each other

Give the correct formula for aluminum sulfate. Al(SO4)3 AlSO4 Al3(SO4)2 Al2SO4 Al2(SO4)3

Al2(SO4)3

Write the formula for the compound formed between aluminum and sulfur. Al2S (AlS)2 Al3S AlS Al2S3

Al2S3

What is the empirical formula for C4H8O2? CHO2 C2H5O C2H4O CHO CH2O

C2H4O

Which of the compounds C3H8, MgCl2, Zn(NO3)2, OCl2 are expected to exist as molecules? C3H8 and OCl2 only C3H8 C3H8, Zn(NO3)2, and OCl2 MgCl2 and Zn(NO3)2

C3H8 and OCl2

Write a possible molecular formula for C4H4O. C12H12O2 C2H2O C8H8O2 C18H18O2

C8H8O2

Identify the compound with covalent bonds Mg LiBr LiCl Ne CH4

CH4

Which of the following is a molecular compound? KBr RbBr CHCl3 CuCl2 NaNO3

CHCl3

What is the chemical formula for iron(II) hydrogen phosphate? FeHPO3 Fe2HPO3 FeHPO4 Fe2HPO4

FeHPO4

The chemical formula for sulfurous acid is H2SO3(aq) H2SO4(aq) H2S(aq) H2S2O7(aq)

H2SO3(aq)

What is the empirical formula for Hg2(NO)2? Hg(NO3)2 Hg2NO3 Hg4(NO3)4 HgNO3 Hg2(NO3)2

HgNO3

Identify the compound with ionic bonds CO KBr Ne H2O O2

KBr

Which of the following is an ionic compound? LiCl NO2 PCl3 CF4 SeBr2

LiCl

In which set do all elements tend to form cations in binary ionic compounds? Mg, Cr, Pb N, As, Bi S, F, Cl Li, B, O

Mg, Cr, Pb

In which set do all elements tend to form anions in binary ionic compounds? Na, Al, Pb Li, Na, K K, Fe, Br N, O, I

N, O, I

Which of the following is a molecular compound? CuF2 RbF NaNO3 SrSO3 N2O4

N2O4

Give the formula for sodium chromate Na2CrO4 Na2Cr2O7 NaCr2O4 NaCrO NaCr3O7

Na2CrO4

Write the name for Ca3(PO4)2 calcium(II) phosphite calcium phosphite tricalcium phosphorus tetraoxide calcium phosphate calcium(III) phosphite

calcium phosphate

Give the name for H2CO3 hydrocarbonic acid dihydrogen carbonate carbonic acid carbonous acid hydrocarbide acid

carbonic acid

The correct name for P2O5 is diphosphorus pentoxide phosphorus(V) oxide phosphorus oxide phosphorus(II) oxide

diphosphorus pentoxide

Determine the name for aqueous HBr. hydrobromic acid perbromic acid bromate acid hydrobromous acid hydrogen bromate

hydrobromic acid

An aqueous solution of HI is named as iodous acid hydroiodous acid iodic acid periodic acid hydroiodic acid

hydroiodic acid

Write the name for PbS lead(I) sulfate lead(II) sulfide lead(II) sulfate lead(I) sulfide lead sulfide

lead(II) sulfide

Li2O is named lithium oxide. lithium(II) oxide. lithium dioxide. lithium oxygen.

lithium oxide

Identify the element whose ion only exists as 2+. carbon magnesium copper lithium argon

magnesium

Which of the following is an atomic element? hydrogen iodine magnesium nitrogen bromine

magnesium

What is the chemical name for HNO2? nitrite acid nitric acid hydrogen nitrite nitrate acid nitrous acid

nitric acid

Which of the following exists as a diatomic molecule? phosphorus nitrogen sodium neon carbon

nitrogen

Which of the following exists as a polyatomic molecule? carbon phosphorus argon sodium neon

phosphorus

Give the name for PBr3 phosphorus dibromide phosphorus tribromide phosphorus(III) bromide phosphorus bromite phosphorus(I) bromide

phosphorus tribromide

Identify the element that chlorine forms an ionic bond with sodium carbon phosphorus xenon oxygen

sodium

Give the name for NaHSO3 monosodium sulfate sodium sulfate sodium sulfide sodium hydrogen sulfite sodium hydrogen sulfate

sodium hydrogen sulfite

Which of the following is a molecular element? sulfur argon titanium silver magnesium

sulfur

Give the name for P4O10 phosphorus oxide diphosphorus pentoxide phosphorus(II) oxide tetraphosphorus decoxide phosphorus(IV) oxide

tetraphosphorus decoxide

A covalent bond is best described as the sharing of electrons between atoms a bond between two polyatomic ions a bond between a metal and a nonmetal the transfer of electrons a bond between a metal and a polyatomic ion

the sharing of electrons between atoms

An ionic bond is best described as -the sharing of electrons -the attraction between two metal atoms -the transfer of electrons from one atom to another -the attractions between two nonmetal atoms -the attractions the holds the atoms together in a polyatomic ion

the transfer of electrons from one atom to another

Write the name for Sn(SO4)2. Remember that Sn forms several ions. tin (I) sulfate tin (IV) sulfate tin (II) sulfite tin (I) sulfite tin sulfide

tin (IV) sulfate