Question 1

Describe a structural formula

Accepted Answer

In a structural formula, lines...

Question 2

Identify the correct formula for sodium chlorate.

Accepted Answer

A)  NaClO
B)  NaClO2
C)  NaClO3
D)  NaClO4

Question 3

Determine the molecular formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.

Accepted Answer

A)  C18H27NO3
B)  C18H27NO2
C)  C17H27NO3
D)  C17H26NO3

Question 4

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Accepted Answer

A)  5.54 × 1025 N2O4 molecules
B)  7.26 × 1023 N2O4 molecules
C)  1.38 × 1024 N2O4 molecules
D)  4.59 × 1025 N2O4 molecules
E)  4.99 × 1023 N2O4 molecules

Question 5

A typical cup of coffee has about 100 mg of caffeine. Calculate the number of caffeine molecules in 100. mg C8H10N4O2.

Accepted Answer

A)  3.22 × 10-21
B)  3.10 × 1020
C)  1.17 × 1025
D)  3.10 × 1022
E)  3.10 × 1025

Question 6

Determine the name for TiCO3. Remember that titanium forms several ions.

Accepted Answer

A)  titanium(II) carbonate
B)  titanium carbide
C)  titanium carbonite
D)  titanium(II) carbonite
E)  titanium(I) carbonate

Question 7

Which of the following contains BOTH ionic and covalent bonds?

Accepted Answer

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

Question 8

Determine the name for N2O5.

Accepted Answer

A)  dinitrogen pentoxide
B)  nitrogen oxide
C)  nitrogen(IV) oxide
D)  nitrogen(II) oxide
E)  nitrogen tetroxide

Question 9

How many chloride ions are there in 4.50 mol of aluminum chloride?

Accepted Answer

A)  3.00 chloride ions
B)  13.5 chloride ions
C)  2.71 × 1024 chloride ions
D)  8.13 × 1024 chloride ions

Question 10

Identify the nitrite ion.

Accepted Answer

A)  NO-3
B)  NO-2
C)  NH+4
D)   N-3
E)  N3-

Question 11

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

Question 12

Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.

Accepted Answer

A)  P3Cl
B)  PCl
C)  PCl2
D)  P2Cl3
E)  PCl3

Question 13

Describe the difference between a molecular formula and an empirical formula. Give an example.

Accepted Answer

A molecular formula is the exact number ...

Question 14

Determine the molecular formula of a compound that has a molar mass of 183.2 g mol-1 and an empirical formula of C2H5O2.

Accepted Answer

A)  C2H5O2
B)  C6H15O6
C)  C3H7O3
D)  C4H10O4
E)  C8H20O8

Question 15

Identify the name for FeS.

Accepted Answer

A)  iron(I) sulfate
B)  iron(I) sulfide
C)  iron(II) sulfide
D)  iron(II) sulfate
E)  iron sulfide

Question 16

The solid compound Na2CO3 contains

Accepted Answer

A)  Na+, C4+, and O2- ions.
B)  Na+ and CO3 -2 ions.
C)  Na2+ and CO3 -2 ions.
D)  Na2CO3 molecules.

Question 17

Identify the formula for sodium chlorate.

Accepted Answer

A)  NaClO
B)  NaClO2
C)  NaClO3
D)  NaClO4

Question 18

Match the following.

-chlorine

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)

Question 19

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Accepted Answer

A)  7.02 × 103 moles N2O4
B)  1.42 × 10-4 moles N2O4
C)  1.00 mole N2O4
D)  1.21 moles N2O4
E)  0.829 moles N2O4

Question 20

Identify the name for SnO.

Accepted Answer

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

Exam 3: Molecules, Compounds, and Nomenclature

Identify the name for SnO.

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Identify the name for FeS.

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How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

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

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Describe the difference between a molecular formula and an empirical formula. Give an example.

Correct AnswerverifiedA molecular formula is the exact number ...View AnswerShow Answer

Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.

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A typical cup of coffee has about 100 mg of caffeine. Calculate the number of caffeine molecules in 100. mg C8H10N4O2.

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Determine the molecular formula of a compound that has a molar mass of 183.2 g mol-1 and an empirical formula of C2H5O2.

Correct AnswerverifiedShow Answer

Describe a structural formula

Correct AnswerverifiedIn a structural formula, lines...View AnswerShow Answer

Identify the formula for sodium chlorate.

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The solid compound Na2CO3 contains

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Identify the correct formula for sodium chlorate.

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Which of the following contains BOTH ionic and covalent bonds?

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Determine the molecular formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.

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How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

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Match the following. -chlorine

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Identify the nitrite ion.

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Determine the name for N2O5.

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How many chloride ions are there in 4.50 mol of aluminum chloride?

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Determine the name for TiCO3. Remember that titanium forms several ions.

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How many molecules of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g mol^-1.

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

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A molecular formula is the exact number ...
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A typical cup of coffee has about 100 mg of caffeine. Calculate the number of caffeine molecules in 100. mg C₈H₁₀N₄O₂.

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Determine the molecular formula of a compound that has a molar mass of 183.2 g mol^-1 and an empirical formula of C₂H₅O₂.

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In a structural formula, lines...
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The solid compound Na₂CO₃ contains

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How many moles of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g mol^-1.

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Determine the name for N₂O₅.

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Determine the name for TiCO₃. Remember that titanium forms several ions.

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