Which is the correct cell notation for the following electrochemical c.docx

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Which is the correct cell notation for the following electrochemical cell? A) Sn(s)|Sn2+(aq,1.0M)||Fe2+(aq,1.0M)|Fe(s) B) Sn(s)|Fe2+(aq,1.0M)||Sn2+(aq,1.0M)|Fe(s) C) Fe(s)|Sn2+(aq,1.0M)||Fe2+(aq,1.0M)|Sn(s) D) Fe(s)|Fe2+(aq,1.0M)||Sn2+(aq,1.0M)|Sn(s) Solution by definition cathode is the one which has more positive reduction potential given Sn+2 (aq) + 2e- ---> Sn (s)Â Â ,,,, Eo = -0.14 V Fe+2 (aq) + 2e- ---> Fe (s) ,,,,,, Eo = -0.44 V so Tin is the cathode here Iron is the anode now oxidation takes place at anode and reduction takes place at cathode anode : Fe(s) ----> Fe+2 (aq) + 2e- cathode : Sn+2 (aq) + 2e- ---> Sn (s) in the cell notation , anode is represented on the left and cathode on the right so Fe(s)|Fe+2(aq)||Sn+2(aq)|Sn(s) so the answer is option D .

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anode : Fe(s) ----> Fe+2 (aq) + 2e-
cathode : Sn+2 (aq) + 2e- ---> Sn (s)
in the cell notation , anode is represented on the left and cathode on the right
so
Fe(s)|Fe+2(aq)||Sn+2(aq)|Sn(s)
so
the answer is option D

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1. Define computer crime and list several examples of computer crime. 2. Explain the purpose of the Computer Fraud and Abuse Act of 1986 and the Electronic Communications Privacy Act of 1986. 3. Contrast hackers versus crackers. 4. Why are insider threats particularly dangerous for organizations? 5. Define malware and give several examples. 6. What are physical access restrictions, and how do they make an information system more secure? 7. Describe three human-based controls for safeguarding information systems. 8. Describe how the Sarbanesâ€“Oxley Act impacts the IS security of an organization. Solution The various examples of computer crime are: A cracker is one who breaks into or otherwise violates the system integrity of remote machines with malicious intent. Having gained unauthorized access, crackers destroy vital data, deny legitimate users service, or cause problems for their targets. Crackers can easily be identified because their actions are malicious. There are two major types of crackers. The first group has expert crackers who discover new security holes and often write programs that exploit them. The second type, the script kiddie , only knows how to get these programs and run them. Script kiddies are more numerous, but much easier to stop and detect. Besides the ethical difference between the two, the major factor that separates hackers from the vast majority of crackers is an understanding of computer systems and the ability to create software. A real hacker can write code in one or more languages (C, C++, assembly, Java) and understands what that code does and why it works (or doesnâ€™t). The majority of crackers have little programming ability, or none at all, and usually donâ€™t understand how the tools they use work. If a machine gets hacked by a script kiddy, its usually because the administrator didnâ€™t maintain the machine and apply patches for known vulnerabilities. While SOX addressed primarily the accounting side of organizations, it did greatly increase the demand for IS auditors. Regulations put in place by SOX require companies to have controls in place to prevent misuse of fraid, controls to detect potential problems, and effective measures to correct any problems found. Information systems are key in today\'s business environments to handle the mass flow of data transmitted on a daily basis. These systems, however, need to be regularly checked to ensure that they are performing their roles effectively. SOX also placed upon businesses a requirement to preserve evidence to document compliance and for potential lawsuits. Since many of these documents have important information, safeguards need to be put in place to prevent private information from being leaked or accessed. Once again, the fact that seemingly everything is digital means that the safeguards are mostly or all technological in nature, again emphasizing IS security. .

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Which form type displays records in a tabular format similar to a Data.docx

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which equation best represents the net ionic reaction that occurs when an aqueous solution of barium iodide is mixed with an aqueous solution of lithium sulfate? No net reaction occurs Ba^2+(aq)+SO4^2-(aq)-> BaSO4(s) BaI2(aq)+Li2SO4(aq)-> BaSO4(s)+2LiI(aq) 2H^+(aq)+2I^-(aq)->2HI(g) Ba^2+(aq)+2I^-(aq)+2Li^+(aq)+SO4^2-(aq)-->BaSO4(s)+2LiI(aq) which equation best represents the net ionic reaction that occurs when an aqueous solution of barium iodide is mixed with an aqueous solution of lithium sulfate? No net reaction occurs Ba^2+(aq)+SO4^2-(aq)-> BaSO4(s) BaI2(aq)+Li2SO4(aq)-> BaSO4(s)+2LiI(aq) 2H^+(aq)+2I^-(aq)->2HI(g) Ba^2+(aq)+2I^-(aq)+2Li^+(aq)+SO4^2-(aq)-->BaSO4(s)+2LiI(aq) No net reaction occurs Ba^2+(aq)+SO4^2-(aq)-> BaSO4(s) BaI2(aq)+Li2SO4(aq)-> BaSO4(s)+2LiI(aq) 2H^+(aq)+2I^-(aq)->2HI(g) Ba^2+(aq)+2I^-(aq)+2Li^+(aq)+SO4^2-(aq)-->BaSO4(s)+2LiI(aq) Solution Ans Reaction between aqueous solution of barium iodide and lithium sulfate BaI 2 (aq) + Li 2 SO 4 (aq) -> BaSO 4 (s) + 2LiI(aq) From above reaction it is clear that formation of barium sulfate is solid i.e. in pure form so not participate in net ionic reaction So net ionic reaction is 2LiI(aq) -> 2 Li + (aq) + 2Cl - (aq) So last equation best to represent the net ionic reaction Ba 2+ (aq) + 2I - (aq) + 2Li + (aq) + SO 4 2- (aq) --> BaSO 4 (s) + 2LiI(aq) .

which equation best represents the net ionic reaction that occurs when.docx

jbarbara1

Which complex in the electron transport chain does not contribute to the proton gradient? Why not? Solution Ans - An electron transport chain ( ETC ) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H + ions) across a membrane. This creates an electrochemical proton gradient that drives the synthesis of adenosine triphosphate (ATP), a molecule that stores energy chemically in the form of highly strained bonds. The molecules of the chain include peptides, enzymes (which are proteins or protein complexes), and others. The final acceptor of electrons in the electron transport chain during aerobic respiration is molecular oxygen although a variety of acceptors other than oxygen such as sulfate exist in anaerobic respiration. The four complexes involved in electron transport chain are Complex II does not contribute to proton gradient in electron transport chain. This complex oxidizes succinate, which is produced in TCA cycle, and transfers electrons to ubiquinone. This complex is not associated with any proton gradient. .

Which complex in the electron transport chain does not contribute to t.docx

jbarbara1

where heat is transfer high in conduction or convection where heat is transfer high in conduction or convection Solution CONDUCTION-- Conduction is the transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them. This then continues and passes the energy from the hot end down to the colder end of the substance. CONVECTION-- Thermal energy is transferred from hot places to cold places by convection. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. Cooler liquid or gas then takes the place of the warmer areas which have risen higher. This results in a continous circulation pattern. Water boiling in a pan is a good example of these convection currents. Another good example of convection is in the atmosphere. The earth\'s surface is warmed by the sun, the warm air rises and cool air moves in. Hence more heat is transferred by CONDUCTION because of the direct contact. .

where heat is transfer high in conduction or convection where heat i.docx

jbarbara1

Where do most college students exist on Maslow\'s hierarchy of needs? Be descriptive in your explanation of why... Please be orginial no articles or cut and paste what are your real thoughts! Thanks !! Solution I think that most college students exist between the Love and Belong and Esteem parts of the hierarchy on the pyramid. Many College students have achieved a sense of love and belonging through relationships wthi their friends and family.Â Â Students have made social connections by being members of sports teams, clubs, fraternities, sororities and other types of activities that help to achieve this pyramid level. At the same time, the need for belonging may become overcome other needs depending on the level of peer pressure. Also, college students have a need to feel respected and values by others. This spills into the Esteem layer of Maslow\'s hierarchy pyramid. Students will participate in a hobby, team or other organization to gain recognition of others. By doing this, students achieve a sense of value and acceptance from others. In some cases, there will be a need to achieve popularity or fame but this will not assist in achieving actual happiness as the sense of value and acceptance must really come from within the student .

Where do most college students exist on Maslow-'s hierarchy of needs-.docx

jbarbara1

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