Chapter 5 Online HW

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Determine whether the following pairs of elements can form ionic compounds.
A) fluorine and sodium
B) oxygen and magnesium
C) potassium and sulfur
D) iron and chlorine
E) nitrogen and iodine
F) lithium and calcium

A) Ionic B) Ionic C) Ionic D) Ionic E) Non-Ionic F) Non-Ionic

What is the formula for an ionic compound that contains the elements calcium and fluorine?
A) CaF
B) Ca₂F
C) CaF₂
D) Ca₂F₂

C) CaF₂

Classify the substances as atomic elements, molecular elements, molecular compounds, or ionic compounds.
A) F₂
B) CO₂
C) HCl
D) H₂
E) KCl
F) Au
G) Al₂S₃
H) Hg

A) Molecular elements B) Molecular compound C) Molecular compound D) Molecular elements E) Ionic compound F) Atomic elements G) Ionic compound H) Atomic elements

Assign each species to the expression that most accurately describes the basic units of that substance; single atoms, diatomic molecules, molecules, formula units.
A) C₃H₈
B) Copper
C) SO₂
D) CoCl₂
E) KMnO₄
F) Xenon
G) Ni
H) HgBr₂
I) H₂
J) Ca(OH)₂
K) Oxygen
L) Chlorine

A) Molecules B) Single atoms C) Molecules D) Formula units E) Formula units F) Single atoms G) Single atoms H) Formula units I) Diatomic molecules J) Formula units K) Diatomic molecules L) Diatomic molecules

Determine the number of each type of atom in each of the following formulas.
A) MgCl₂
B) NaNO₃
C) Ca(NO₂)₂
D) Sr(OH)₂

A) Mg=1, Cl=2 B) Na=1, N=1, O=3 C) Ca=1, N=2, O=4 D) Sr=1, O=2, H=2

Which of the following elements have molecules as their basic units?
Check all that apply.
A) silver
B) helium
C) chlorine
D) hydrogen

C) chlorine D) hydrogen

Write a formula for the ionic compound that forms from each of the following pairs of elements.
A) aluminum and oxygen
B) beryllium and iodine
C) calcium and sulfur
D) calcium and iodine

A) Al₂O₃ B) BeI₂ C) CaS D) CaI₂

Match the substances with the basic units that compose them; molecules, single atoms, diatomic molecules, formula units
A) nitrogen
B) copper metal
C) NI₃
D) SrCl₂

A) diatomic molecules B) single atoms C) molecules D) formula units

Upon decomposition, one sample of magnesium fluoride produced 2.35 kg of magnesium and 3.67 kg of fluorine. A second sample produced 1.00 kg of magnesium. How much fluorine (in grams) did the second sample produce?

1560 g

What is the formula mass of magnesium chloride, MgCl₂? (Use 4 significant figures.)

95.21 amu

What is the formula mass of calcium nitrate, Ca(NO₃)₂? (Use 5 significant figures.)

164.10 amu

What is the formula mass of propanol, C₃H₇OH? (Use 4 significant figures.)

60.11 amu

Write formulas for the compounds that form from Rb and each of the following polyatomic ion:
A) NO₃⁻
B) SO₄²⁻
C) PO₄³⁻

A) RbNO₃ B) Rb₂SO₄ C) Rb₃PO₄

Write formulas for the compounds that form from Sr and each of the following polyatomic ion:
A) NO₃⁻
B) SO₄²⁻
C) PO₄³⁻

A) Sr(NO₃)₂ B) SrSO₄ C) Sr₃(PO₄)₂

Write formulas for the compounds that form from In and each of the following polyatomic ion: (Assume In charge is 3+.)
A) NO₃⁻
B) SO₄²⁻
C) PO₄³⁻

A) In(NO₃)₃ B) In₂(SO₄)₃ C) InPO₄

Name each of the following Type I ionic compounds.
A) LiI
B) MgS
C) BaF₂
D) NaF

A) lithium iodide B) magnesium sulfide C) barium fluoride D) sodium fluoride

Name each of the following Type II ionic compounds.
A) HgBr₂
B) Fe₂O₃
C) CuI₂
D) SnCl₄

A) mercury(II) bromide B) iron(III) oxide C) copper(II) iodide D) tin(IV) chloride

Name each of the following ionic compounds containing a polyatomic ion.
A) Ba(NO₃)₂
B) Pb(C₂H₃O₂)₂
D) KClO₃

A) barium nitrate B) lead (II) acetate C) ammonium iodide D) potassium chlorate

Write a formula for each of the following ionic compounds.
A) copper(I) chlorate
B) potassium permanganate
C) lead(II) chromate
D) calcium fluoride
E) iron(II) phosphate
F) lithium hydrogen sulfite

A) CuClO₃ B) KMnO₄ C) PbCrO₄ D) CaF₂ E) Fe₃(PO₄)₂ F) LiHSO₃

Name each of the following molecular compounds.
A) SO₂
B) NI₃
C) BrF₅
E) N₄Se₄

A) sulfur dioxide B) nitrogen triiodide C) bromine pentafluoride D) nitrogen monoxide E) tetranitrogen tetraselenide

Write a formula for each of the following molecular compounds.
A) chlorine monoxide
B) xenon tetroxide
C) xenon hexafluoride
D) carbon tetrabromide
E) diboron tetrachloride
F) tetraphosphorus triselenide

A) ClO B) XeO₄ C) XeF₆ D) CBr₄ E) B₂Cl₄ F) P₄Se₃

Name each of the following acids.
A) H₂CO₃(aq)
B) HC₂H₃O₂(aq)
C) HNO₂(aq)
D) HCl(aq)

A) carbonic acid B) acetic acid C) nitrous acid D) hydrochloric acid

Write a formula for each of the following acids.
A) hydrofluoric acid
B) hydrocyanic acid
C) chlorous acid


Calculate the formula mass for each of the following compounds.
A) CS₂ (4 sig figs)
B) C₆H₁₂O₆ (5 sig figs)
C) Fe(NO₃)₃
D) C₇H₁₆

A) 76.15 amu B) 180.18 amu C) 241.88 amu D) 100.23 amu

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