
(a)
Interpretation: The empirical formula and the molecular formula of the given helicene are to be calculated. The balanced
Concept introduction: Helicines are defined as the polycyclic
To determine: The empirical formula of the given helicene.
(a)

Answer to Problem 160IP
Answer
The empirical formula of the given helicene is
Explanation of Solution
Explanation
The empirical formula of the given helicene is
Helicene is an aromatic compound so it must contain carbon and hydrogen atoms.
Given
Weight of
Weight of compound is
The weight of carbon is calculated by using the formula,
The molar mass of carbon is
The molar mass of carbon dioxide is
Substitute the value of weight of
The weight of carbon is
Therefore the weight of hydrogen is calculated as,
Therefore the number of moles of carbon and hydrogen is calculated by the formula,
Substitute the value of the given mass and the molar mass, to calculate the number of moles of carbon and hydrogen in the above equation.
For carbon,
For hydrogen,
The calculated values are divided by the smallest number of moles to determine the simplest whole number ratio of moles of each constituent.
For carbon
For hydrogen
By multiplying each with 3 we get the whole number as,
For carbon
For hydrogen
Hence, the empirical formula of the compound is
(b)
Interpretation: The empirical formula and the molecular formula of the given helicene are to be calculated. The balanced chemical reaction for the combustion of helicene is to be stated.
Concept introduction: Helicines are defined as the polycyclic aromatic compounds in which the aromatic ring is annulated to provide helically shaped molecule. The molecular formula of any organic compound is determined by using empirical formula when the percent of each element is given in the compound.
To determine: The molecular formula of the given helicene.
(b)

Answer to Problem 160IP
Answer
The molecular formula of the given helicene is
Explanation of Solution
Explanation
The molecular formula of the given helicene is
Given
Molality is
Weight of solvent is
Weight of solute is
Therefore the molecular weight of solute is calculated by the given expression.
Substitute the values of weight of solute, molality and weight of solvent in the above expression.
Now, The empirical mass of
Substitute the value of molecular and empirical weight in the above expression.
Therefore the molecular formula is calculated as,
Hence, the molecular formula is
(c)
Interpretation: The empirical formula and the molecular formula of the given helicene are to be calculated. The balanced chemical reaction for the combustion of helicene is to be stated.
Concept introduction: Helicines are defined as the polycyclic aromatic compounds in which the aromatic ring is annulated to provide helically shaped molecule. The molecular formula of any organic compound is determined by using empirical formula when the percent of each element is given in the compound.
To determine: The balanced chemical reaction for the combustion of helicene.
(c)

Answer to Problem 160IP
Answer
The balanced chemical reaction for the combustion of helicene is,
Explanation of Solution
Explanation
The balanced chemical reaction for the combustion of helicene is shown below.
The balanced reaction for the combustion of helicene is,
Want to see more full solutions like this?
Chapter 22 Solutions
CHEMISTRY,AP EDITION-W/ACCESS (HS)
- Experiment 27 hates & Mechanisms of Reations Method I visual Clock Reaction A. Concentration effects on reaction Rates Iodine Run [I] mol/L [S₂082] | Time mo/L (SCC) 0.04 54.7 Log 1/ Time Temp Log [ ] 13,20] (time) / [I] 199 20.06 23.0 30.04 0.04 0.04 80.0 22.8 45 40.02 0.04 79.0 21.6 50.08 0.03 51.0 22.4 60-080-02 95.0 23.4 7 0.08 0-01 1970 23.4 8 0.08 0.04 16.1 22.6arrow_forward(15 pts) Consider the molecule B2H6. Generate a molecular orbital diagram but this time using a different approach that draws on your knowledge and ability to put concepts together. First use VSEPR or some other method to make sure you know the ground state structure of the molecule. Next, generate an MO diagram for BH2. Sketch the highest occupied and lowest unoccupied MOs of the BH2 fragment. These are called frontier orbitals. Now use these frontier orbitals as your basis set for producing LGO's for B2H6. Since the BH2 frontier orbitals become the LGOS, you will have to think about what is in the middle of the molecule and treat its basis as well. Do you arrive at the same qualitative MO diagram as is discussed in the book? Sketch the new highest occupied and lowest unoccupied MOs for the molecule (B2H6).arrow_forwardQ8: Propose an efficient synthesis of cyclopentene from cyclopentane.arrow_forward
- Q7: Use compound A-D, design two different ways to synthesize E. Which way is preferred? Please explain. CH3I ONa NaOCH 3 A B C D E OCH3arrow_forwardPredict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2).arrow_forward(10 pts) The density of metallic copper is 8.92 g cm³. The structure of this metal is cubic close-packed. What is the atomic radius of copper in copper metal?arrow_forward
- Predict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2).arrow_forwardPredict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2).arrow_forwardQ3: Rank the following compounds in increasing reactivity of E1 and E2 eliminations, respectively. Br ca. go do A CI CI B C CI Darrow_forward
- Q5: Predict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2). H₂O דיי "Br KN3 CH3CH2OH NaNH2 NH3 Page 3 of 6 Chem 0310 Organic Chemistry 1 HW Problem Sets CI Br excess NaOCH 3 CH3OH Br KOC(CH3)3 DuckDuckGarrow_forwardQ4: Circle the substrate that gives a single alkene product in a E2 elimination. CI CI Br Brarrow_forwardPlease calculate the chemical shift of each protonsarrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning





