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The contents of the closed boxes in each of the depictions below represents a system, and the arrows show the changes to the system during some process. Which of these processes is endothermic? 1.The first diagram has a box with 2 arrows heat(q) and work(w) leaving the box (system) to the surroundings. 2. The second diagram has one arrow representing work(w) going into the system from the surroundings. 3. The third diagram has one arrow representing heat (q) going into the system from the surroundings. The answer is the third diagram only. Why is it not the second and third diagram?
Which of the following nuclides have magic numbers of both protons and neutrons: (a) helium-4, (b) oxygen-18, (c) calcium-40, (d) zinc-66, (e) lead-208
The RUBISCO catalyzed reaction is: a. Exergonic, because Ribulose-,5-biphosphate has enormous energy charge built up from previous phosphorylations
what will be the temperature of the system when equilibrium is established? Â (sp Heat of H2O(s) = 2.09j/g . c (sp heat of H2O (l) = 4.18 J/g.c) Heat of Fus. of H2O(s)=333j/g
You have 500 mL of a 5.0 M solution of nitric acid HNO3 (63.01 g /?mol) dissolved in water. How many grams of nitrogen does the solution contain.
what is the percentage yield if 400 grams of chlorine react with excess potassium bromide to produce 820 grams of bromine
The Carbocation, 1,1-dimethylpropyl, formed from the dehydration of protonated 2-methyl-2-butanol.
Treatment of (S)-( )-5-methyl-2-cyclohexenone with lithium dimethylcuprate gives, after protonolysis, a good yield of a mixture containing mostly a dextrorotatory ketone A and a trace of an optically inactive isomer B
535 g piece of copper tubing is heated to 91.5°C and placed in an insulated vessel containing 58.5 g of water at 29.5°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K, what is the final temperature of the system (c of copp..
Why do you suppose that the dehydration of cyclohexanol to cyclohexene has been the tradiotional experiment to illustrate the acid-catalyzed dehydration of an alcohol to an alkene?
C4H10(g) + O2(g) CO2(g) + H2O(g) Consider the above unbalanced equation. What volume of O2 at 555 mm Hg and 56.0°C is required to produce 285 mL of CO2 at 780. mm Hg and 131°C?
The Ksp for AgCl = 1.8x10^-10, @25 degrees Celsius. If the goal is to harvest silver ions from a film stop bath, and the plan is to get the silver ion concentration down to 18x10^-12 M, using NaCl, what concentration of Cl- ion, in M is required
calculate the heat absorbed by 15.0 g of water to raise its temperature from 20.0oc to 50.0oc at constant pressure. the
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