Used widely prior to the end of the 20th Century, chlorofluorocarbons (CFCS for short) were widely used as refrigerants for both industrial and household applications. One CFC, called Freon-11 (fluorotrichloromethane) is an organic compound that has been classified as an ozone depleting substance owing to its propensity to break down via a free radical process. It has a chemical formula of CFCh. Carefully examine the structural diagram of Freon-11 then click on its MOST polar bond. F C. CI CI Selected Coordinates Clear Question 20 of 29

Used widely prior to the end of the 20th Century, chlorofluorocarbons (CFCS for short) were widely used as refrigerants for both industrial and household applications. One CFC, called Freon-11 (fluorotrichloromethane) is an organic compound that has been classified as an ozone depleting substance owing to its propensity to break down via a free radical process. It has a chemical formula of CFCh. Carefully examine the structural diagram of Freon-11 then click on its MOST polar bond. F C. CI CI Selected Coordinates Clear Question 20 of 29

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere. Rowland and Molina hypothesized that chlorofluorocarbons (CFCs) in the stratosphere break down upon exposure to UV radiation, producing chlorine atoms. Chlorine was previously identified as a catalyst in the breakdown of ozone into oxygen gas. Using the enthalpy of reaction for two reactions with ozone, determine the enthalpy of reaction for the reaction of chlorine with ozone. (1)ClO(g)+O3(g)⟶Cl(g)+2O2(g)Δ?∘rxn=−122.8 kJ (2)2O3(g)⟶3O2(g)Δ?∘rxn=−285.3 kJ (3)O3(g)+Cl(g)⟶ClO(g)+O2(g) Δ?∘rxn= ?
11:27 2NH4+ (aq) + HCO3- (aq) The reaction is first order with respect to urea, and first order overall with a rate constant of 4.28 x 10^(-4)s^(-1) a. Write the rate law for this reaction. b. If the reaction begins with an initial urea concentration of 0.500 M, what will the concentration of urea in the solution be after 2500 s? C) Calculate the half life of this reaction. d. At what time (+) will the concentration of urea be 0.020 M? O □
9:54 AM Mon Aug 9 * 92% AA saplinglearning.com + Sapling Learning SCC 110 Final Exam Audrea Formantes - macmillan learning Sapling Learning > LaGuardia Community College - SCC 110 - Summer21 - TSAI > Activities and Due Dates > sCC 110 Final Exam Check Answer Assignment Score: 74% Resources Hint 01 49 -- Consider the following reaction. MgCl, (aq) + 2 NaOH(aq) → Mg(OH), (s) + 2 NaCI(aq) Calculate the volume of 0.275 M MgCl, that is needed to react completely with 26.2 mL of 0.432 M NaOH. O 41.2 mL O 8.34 mL O 20.6 mL O 82.3 mL !!!
2C4H6(g) → C8H12(g) At high temperatures, the compound C4H6 (1,3-butadiene) reacts according to the equation above. The rate of the reaction was studied at 625 K in a rigid reaction vessel. Two different trials, each shown with a different starting concentration, were carried out. The data were plotted in three different ways, as shown below. (a) For trial 1, calculate the initial pressure, in atm, in the vessel at 625 K. Assume that initially all the gas present in the vessel is C4H6. (Hint-this is a gas law problem from chemistry last year) (b) Use the data plotted in the graphs to determine the order of the reaction with respect to C4H6. (c) The initial rate of the reaction in trial 1 is 0.0010 mol/(L *s). Calculate the rate constant, k, for the reaction at 625 K.
In a hot combustion chamber, oxygen diffuses through air to a flat carbon surface where it reacts to produce CO and/or CO2. Reduce the general differential equation for mass transfer to write a specific differential equation for oxygen that will describe the steady-state mass transfer process. The concentration of oxygen at z=δ is 21 mole percent. The reaction at the surface may be assumed to occur instantaneously. No reaction occurs in the gas film. What would be the form of the equation providing the flux of oxygen if (a) only carbon monoxide is produced on the carbon surface; (b) only carbon dioxide is produced on the carbon surface; (c) the following instantaneous reaction occurs on the surface, 4C+3O2→2CO+2CO2.
Why does the product (a•b), rather than the sum (a + b) appear in the Law of Mass Action? This is sometimes brought up to demonstrate how/why nonlinear terms arise in differential equations. The law of mass action states that The rate of a chemical reaction involving an interaction of two or more chemical species is proportional to the product of the concentrations of the given species. This is NOT an assignment...I'm just curious and trying to understand mathematical relations better. Thanks!
Discuss the mechanism by which CFCs and related compounds destroy the ozone layer. What chemical bond in the CFC is critical in this mechanism?
A. Consider the following proposed mechanism for the production of chlorine dixoide from chlorine and ozone. Draw a reaction coordinate diagram for this reaction. Label reactants, products, transition states, intermediates, and activation energy on your sketch. Assume the reaction is endothermic. NOTE: CI is chlorine, not Carbon lodide Overall: Cl₂ (g) + 203 (g) → 2 CIO₂ (g) + O₂ (g) Step 1: Cl₂ (g) → 2 Cl (g) fast Step 2: Cl (g) + Os (g) CIO₂ +O fast Step 3: O (g) + O3 (g) → 202 (g) fast Step 4: Cl (g) + O2 (g) → CIO2 (g) slow
There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In the first step, calcium carbide and water react to form acetylene and calcium hydroxide: CaC(s) + 2 H₂O(9)-C₂H₂(g) + Ca(OH)₂(s) In the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6C₂H₂(g) + 3 CO₂(9)+ 4H₂O(g)-5CH₂CHCO,H(9) Write the net chemical equation for the production of acrylic acid from calcium carbide, water and carbon dioxide. Be sure your equation is balanced. 4
11:03 AM Sun Oct 22 Question 11 of 34 16% 0 mol Subm How many moles of lithium hydroxide would be required to produce 72.0 g of Li₂CO3 in the following chemical reaction? 2 LIOH(s) + CO2 (g) → Li₂CO3 (s) + H₂O (1)
List two types of chemical compounds that must be present in the air for photochemical smog to from. what are the most common sources of these compounds?
The impact of CFCs on the ozone layer is amplified by the fact that the decomposition of a single CFC molecule can result in the destruction of thousands of ozone molecules. CFCs react with oxygen to produce many reactive intermediates. O CFCs replicate in the stratosphere. O CFCs decompose before reaching the stratosphere.