Question 1

Calculate the molar mass of Ca3(PO4)2.

Accepted Answer

A) 87.05 g mol-1 
B) 215.21 g mol-1 
C) 310.18 g mol-1 
D) 279.21 g mol-1 
E) 246.18 g mol-1 
A) 87.05 g mol-1 
B) 215.21 g mol-1 
C) 310.18 g mol-1 
D) 279.21 g mol-1 
E) 246.18 g mol-1

Question 2

Which of the following exists as a diatomic molecule?

Accepted Answer

A) N 
B) C 
C) P 
D) Na 
E) Ne 
A) N 
B) C 
C) P 
D) Na 
E) Ne

Question 3

Identify a hydrocarbon.

Accepted Answer

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

Question 4

The chemical formula for calcium nitride is

Accepted Answer

A) Ca(NO3)2. 
B) Ca(NO2)2. 
C) Ca3N2. 
D) CaN2. 
A) Ca(NO3)2. 
B) Ca(NO2)2. 
C) Ca3N2. 
D) CaN2.

Question 5

Identify the compound with (a)covalent bond(s).

Accepted Answer

A) CH4 
B) Ne 
C) KBr 
D) Mg 
E) NaCl 
A) CH4 
B) Ne 
C) KBr 
D) Mg 
E) NaCl

Question 6

What is the chemical formula for iron(III)sulfate?

Accepted Answer

A) Fe3S 
B) Fe3SO4 
C) Fe2S3 
D) Fe2(SO4)3 
A) Fe3S 
B) Fe3SO4 
C) Fe2S3 
D) Fe2(SO4)3

Question 7

Which of the following is a molecular compound?

Accepted Answer

A) CuCl2 
B) KCl 
C) NaNO3 
D) CH3Cl 
E) RbBr 
A) CuCl2 
B) KCl 
C) NaNO3 
D) CH3Cl 
E) RbBr

Question 8

What is the molar mass of 1-butene if 5.38 × 1016 molecules of 1-butene weigh 5.00 μg?

Accepted Answer

A) 56.0 g mol-1 
B) 178 g mol-1 
C) 224 g mol-1 
D) 447 g mol-1 
A) 56.0 g mol-1 
B) 178 g mol-1 
C) 224 g mol-1 
D) 447 g mol-1

Question 9

What is the mass of 0.500 mol of dichlorodifluoromethane, CCl2F2?

Accepted Answer

A) 4.14 × 10-3 g 
B) 60.5 g 
C) 121 g 
D) 242 g 
A) 4.14 × 10-3 g 
B) 60.5 g 
C) 121 g 
D) 242 g

Question 10

Define empirical formula.

Accepted Answer

An empirical formula

Question 11

Identify the name for the compound Fe(C2H3O2)2.

Accepted Answer

A) iron(II)hydrogen carbonate 
B) iron(III)carbonate 
C) iron acetate 
D) iron(II)acetate 
E) iron(II)dihydrogen phosphate 
A) iron(II)hydrogen carbonate 
B) iron(III)carbonate 
C) iron acetate 
D) iron(II)acetate 
E) iron(II)dihydrogen phosphate

Question 12

Which of the following is an atomic element?

Accepted Answer

A) Br 
B) H 
C) N 
D) O 
E) Mg 
A) Br 
B) H 
C) N 
D) O 
E) Mg

Question 13

What is the mass (in kg)of 6.89 × 1025 molecules of CO2? The molar mass of CO2 is 44.01 g mol-1.

Accepted Answer

A) 3.85 kg 
B) 5.04 kg 
C) 2.60 kg 
D) 3.03 kg 
E) 6.39 kg 
A) 3.85 kg 
B) 5.04 kg 
C) 2.60 kg 
D) 3.03 kg 
E) 6.39 kg

Question 14

How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g mol-1.

Accepted Answer

A) 1.52 × 1027 sodium ions 
B) 4.76 × 1020 sodium ions 
C) 2.10 × 1021 sodium ions 
D) 1.05 × 1021 sodium ions 
E) 9.52 × 1020 sodium ions 
A) 1.52 × 1027 sodium ions 
B) 4.76 × 1020 sodium ions 
C) 2.10 × 1021 sodium ions 
D) 1.05 × 1021 sodium ions 
E) 9.52 × 1020 sodium ions

Question 15

Match the following.

-oxygen

Accepted Answer

A) H(g) 
B) Ca2(s) 
C) I(s) 
D) Ne2(g) 
E) I2(s)
F)Ne(g)
G)Cl2(g)
H)Cl(g)
I)Ca(s)
J)H2(g)
K)O(g)
L)O2(g) 
A) H(g) 
B) Ca2(s) 
C) I(s) 
D) Ne2(g) 
E) I2(s)
F)Ne(g)
G)Cl2(g)
H)Cl(g)
I)Ca(s)
J)H2(g)
K)O(g)
L)O2(g)

Question 16

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 17

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

Accepted Answer

A) 28.12% 
B) 9.372% 
C) 42.73% 
D) 21.38% 
E) 35.97% 
A) 28.12% 
B) 9.372% 
C) 42.73% 
D) 21.38% 
E) 35.97%

Question 18

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 19

Identify the name for Sr(NO3)2∙4H2O.

Accepted Answer

A) tin(II)nitrate tetrahydrate 
B) strontium nitrate tetrahydrate 
C) scandium nitrate tetrahydrate 
D) tin(III)nitrate tetrahydrate 
E) tin(II)nitrate quadhydrate 
A) tin(II)nitrate tetrahydrate 
B) strontium nitrate tetrahydrate 
C) scandium nitrate tetrahydrate 
D) tin(III)nitrate tetrahydrate 
E) tin(II)nitrate quadhydrate

Question 20

Calculate the molar mass of H2CO3.

Accepted Answer

A) 62.03 g mol-1 
B) 29.02 g mol-1 
C) 61.02 g mol-1 
D) 60.01 g mol-1 
E) 74.04 g mol-1 
A) 62.03 g mol-1 
B) 29.02 g mol-1 
C) 61.02 g mol-1 
D) 60.01 g mol-1 
E) 74.04 g mol-1

Exam 3: Molecules, Compounds, and Nomenclature

Calculate the molar mass of Ca3(PO4)2.

Which of the following exists as a diatomic molecule?

Identify a hydrocarbon.

The chemical formula for calcium nitride is

Identify the compound with (a)covalent bond(s).

What is the chemical formula for iron(III)sulfate?

Which of the following is a molecular compound?

What is the molar mass of 1-butene if 5.38 × 1016 molecules of 1-butene weigh 5.00 μg?

What is the mass of 0.500 mol of dichlorodifluoromethane, CCl2F2?

Define empirical formula.

Identify the name for the compound Fe(C2H3O2)2.

Which of the following is an atomic element?

What is the mass (in kg)of 6.89 × 1025 molecules of CO2? The molar mass of CO2 is 44.01 g mol-1.

How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g mol-1.

Match the following. -oxygen

Identify the name for Ca3(PO4)2.

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

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

Identify the name for Sr(NO3)2∙4H2O.

Calculate the molar mass of H2CO3.

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 Metallury

Transition Metals and Coordination Compounds

Filters

Calculate the molar mass of Ca₃(PO₄)₂.

What is the molar mass of 1-butene if 5.38 × 10¹⁶ molecules of 1-butene weigh 5.00 μg?

What is the mass of 0.500 mol of dichlorodifluoromethane, CCl₂F₂?

Identify the name for the compound Fe(C₂H₃O₂)₂.

What is the mass (in kg)of 6.89 × 10²⁵molecules of CO₂? The molar mass of CO₂ is 44.01 g mol^-1.

How many sodium ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃is 126.05 g mol^-1.

Identify the name for Ca₃(PO₄)₂.

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

Identify the name for Sr(NO₃)₂∙4H₂O.

Calculate the molar mass of H₂CO₃.