Question 1

The compound Cu(N O2  )2,is named

Accepted Answer

A) copper nitrite(II). 
B) copper(I)nitrite. 
C) copper(I)nitrite(II). 
D) copper(II)nitrite. 
A) copper nitrite(II). 
B) copper(I)nitrite. 
C) copper(I)nitrite(II). 
D) copper(II)nitrite.

Question 2

What is the molar mass of nitrogen gas?

Accepted Answer

A) 14.0 g mol-1 
B) 28.0 g mol-1 
C) 6.02 × 1023 g mol-1 
D) 1.20 × 1023 g mol-1 
A) 14.0 g mol-1 
B) 28.0 g mol-1 
C) 6.02 × 1023 g mol-1 
D) 1.20 × 1023 g mol-1

Question 3

Identify the name for SnO.

Accepted Answer

A) tin(I)oxide 
B) tin(II)oxide 
C) tin(III)oxide 
D) tin(IV)oxide 
A) tin(I)oxide 
B) tin(II)oxide 
C) tin(III)oxide 
D) tin(IV)oxide

Question 4

Which of the following contains both ionic and covalent bonds?

Accepted Answer

A) KI 
B) NH4Cl 
C) CaS 
D) H2S 
E) SiF4 
A) KI 
B) NH4Cl 
C) CaS 
D) H2S 
E) SiF4

Question 5

Identify the formula for magnesium nitrate hexahydrate.

Accepted Answer

A) Mg(NO3)2∙5H2O 
B) Mg(NO3)2∙6H2O 
C) Mg(NO3)2∙7H2O 
D) MgNO3∙5H2O 
E) MgNO3∙6H2O 
A) Mg(NO3)2∙5H2O 
B) Mg(NO3)2∙6H2O 
C) Mg(NO3)2∙7H2O 
D) MgNO3∙5H2O 
E) MgNO3∙6H2O

Question 6

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Accepted Answer

A) 5.05% 
B) 10.1% 
C) 20.2% 
D) 40.4% 
A) 5.05% 
B) 10.1% 
C) 20.2% 
D) 40.4%

Question 7

Identify the charge,X,on the phosphide ion PX.

Accepted Answer

A) -4 
B) -3 
C) -2 
D) -1 
E) +1 
A) -4 
B) -3 
C) -2 
D) -1 
E) +1

Question 8

What is the chemical formula for magnesium hydride?

Accepted Answer

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

Question 9

How many cations are there in 10.0 g of sodium phosphate?

Accepted Answer

A) 3.67 × 1022 cations 
B) 1.10 × 1023 cations 
C) 9.87 × 1024 cations 
D) 2.96 × 1025 cations 
A) 3.67 × 1022 cations 
B) 1.10 × 1023 cations 
C) 9.87 × 1024 cations 
D) 2.96 × 1025 cations

Question 10

Combustion analysis of an unknown hydrocarbon produced the following results: C 60.00%,H 4.48%,O 35.52%.Determine the empirical formula.

Accepted Answer

A) C9H9O5 
B) C9H8O3 
C) C8H9O4 
D) C9H8O4 
E) C8H8O4 
A) C9H9O5 
B) C9H8O3 
C) C8H9O4 
D) C9H8O4 
E) C8H8O4

Question 11

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO3).

Accepted Answer

Question 12

How many molecules are in 16.61 g of acetic acid,C2H4O2?

Accepted Answer

A) 6.007 × 1026 
B) 6.0375 × 1023 
C) 1.666 × 1023 
D) 6.0375 × 1020 
E) 6.004 × 10-24 
A) 6.007 × 1026 
B) 6.0375 × 1023 
C) 1.666 × 1023 
D) 6.0375 × 1020 
E) 6.004 × 10-24

Question 13

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

Accepted Answer

A) CH4 
B) CaCl2 
C) KBr 
D) MgCl2 
E) NaCl 
A) CH4 
B) CaCl2 
C) KBr 
D) MgCl2 
E) NaCl

Question 14

The chemical formula for sulfurous acid is

Accepted Answer

A) H2S(aq). 
B) HSO3(aq). 
C) HSO4(aq). 
D) H2SO3(aq). 
A) H2S(aq). 
B) HSO3(aq). 
C) HSO4(aq). 
D) H2SO3(aq).

Question 15

How many anions are there in 2.50 g of MgBr2?

Accepted Answer

A) 8.18 × 1021 anions 
B) 1.64 × 1022 anions 
C) 4.43 × 1025 anions 
D) 8.87 × 1025 anions 
A) 8.18 × 1021 anions 
B) 1.64 × 1022 anions 
C) 4.43 × 1025 anions 
D) 8.87 × 1025 anions

Question 16

Which of the following is an ionic compound?

Accepted Answer

A) SCl2 
B) Mg3(PO4)2 
C) Cl2O 
D) CH2O 
E) PF5 
A) SCl2 
B) Mg3(PO4)2 
C) Cl2O 
D) CH2O 
E) PF5

Question 17

How many moles are there in 3.00 g of ethanol,CH3CH2OH?

Accepted Answer

A) 0.00725 mol 
B) 0.0652 mol 
C) 15.3 mol 
D) 138 mol 
A) 0.00725 mol 
B) 0.0652 mol 
C) 15.3 mol 
D) 138 mol

Question 18

Identify the nitrite ion.

Accepted Answer

A) $\mathrm { NO } _ { 3 } ^ { - }$ 
B) $\mathrm { NO } _ { 2 } ^ { - }$ 
C) $\mathrm { NH } _ { 4 } ^ { + }$ 
D)  $\mathrm { N } _ { 3 } ^ { - }$ 
E) $\text { N3- }$ 
A) $\mathrm { NO } _ { 3 } ^ { - }$ 
B) $\mathrm { NO } _ { 2 } ^ { - }$ 
C) $\mathrm { NH } _ { 4 } ^ { + }$ 
D)  $\mathrm { N } _ { 3 } ^ { - }$ 
E) $\text { N3- }$

Question 19

What is the mass of a single fluorine molecule,F2?

Accepted Answer

A) 3.155 × 10-23 g 
B) 6.310 × 10-23 g 
C) 19.00 g 
D) 38.00 g 
A) 3.155 × 10-23 g 
B) 6.310 × 10-23 g 
C) 19.00 g 
D) 38.00 g

Question 20

Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane.The density of hexane is 0.6548 g mL-1 and its molar mass is 86.18 g mol-1.

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

Exam 3: Molecules,compounds,and Nomenclature

The compound Cu(N O2 )2,is named

What is the molar mass of nitrogen gas?

Identify the name for SnO.

Which of the following contains both ionic and covalent bonds?

Identify the formula for magnesium nitrate hexahydrate.

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Identify the charge,X,on the phosphide ion PX.

What is the chemical formula for magnesium hydride?

How many cations are there in 10.0 g of sodium phosphate?

Combustion analysis of an unknown hydrocarbon produced the following results: C 60.00%,H 4.48%,O 35.52%.Determine the empirical formula.

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO3).

How many molecules are in 16.61 g of acetic acid,C2H4O2?

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

The chemical formula for sulfurous acid is

How many anions are there in 2.50 g of MgBr2?

Which of the following is an ionic compound?

How many moles are there in 3.00 g of ethanol,CH3CH2OH?

Identify the nitrite ion.

What is the mass of a single fluorine molecule,F2?

Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane.The density of hexane is 0.6548 g mL-1 and its molar mass is 86.18 g mol-1.

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 Metallurgy

Transition Metals and Coordination Compounds

Filters

The compound Cu(NO₂ )₂,is named

Identify the charge,X,on the phosphide ion P^X.

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO₃).

How many molecules are in 16.61 g of acetic acid,C₂H₄O₂?

How many anions are there in 2.50 g of MgBr₂?

How many moles are there in 3.00 g of ethanol,CH₃CH₂OH?

What is the mass of a single fluorine molecule,F₂?

Determine the volume of hexane that contains 5.33 × 10²² molecules of hexane.The density of hexane is 0.6548 g mL^-1 and its molar mass is 86.18 g mol^-1.