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Calculate the concentration of N2O5 in the vessel 9.90 seconds later. Round to two dig figs.
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- One of the many remarkable enzymes in the human bodyis carbonic anhydrase, which catalyzes the interconversionof carbon dioxide and water with bicarbonate ionand protons. If it were not for this enzyme, the body couldnot rid itself rapidly enough of the CO2 accumulated bycell metabolism. The enzyme catalyzes the dehydration(release to air) of up to 107 CO2 molecules per second.Which components of this description correspond to theterms enzyme, substrate, and turnover number?The gas phase reaction between hydrogen and iodine is proposed to occur as follows:.....step 1.....fast:......I2 2 I.....step 2.....slow:....H2 + 2 I 2 HI(1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank. + + (2) Enter the formula of any species that acts as a reaction intermediate? If none leave box blank: (3) Complete the rate law for the overall reaction that is consistent with this mechanism.Use the form k[A]m[B]n... , where '1' is understood (so don't write it if it's a '1') for m, n etc. Rate =A reinforced reaction vessel is loaded with 2.00 moles of lithium metal and 1.50 moles of solid iodine. The vessel is evacuated to remove any gases and heated to promote the reaction below. 2 Li(s) + I₂(s) --> 2 LiI(s) At the end of the reaction, remains in the vessel along with the LiI that was produced.
- DDT (molar mass % 354.49 g/mol) was a widely used insecticide that was banned from use in the United States in 1973. This ban was brought about due to the persistence of DDT in many different ecosystems, leading to high accumulations of the substance in many birds of prey. The insecticide was shown to cause a thinning of egg shells, pushing many birds toward extinction. If a 20-L drum of DDT was spilled into a pond, resulting in a DDT concentration of 8.75 X 10-5 M, how long would it take for the levels of DDT to reach a concentration of 1.41 X 10-7 M (a level that is generally assumed safe in mammals)? Assume the decomposition of DDT is a frst-order process with a half-life of 56.0 days.Thiosulfate ions are oxidized by iodine according to the reaction below:2 S2O 33- (aq) + I2 (aq) → S 4O 62- (aq) + 2I -(aq)If 0.0080 mol of S2 O32- is consumed in 1.0 L of solution every second, what isconsumption rate of iodine?Module 14 Discussion: Logarithmic Application A Radiative Forcing Radiative forcing, R, measures the influence of carbon dioxide in altering the additional solar ration trapped in Earth's atmosphere. The International Panel on Climate Change (IPCC) in 1990 estimated k to be 6.3 in the radiative forcing equation R = k In(), where Co is the preindustrial amount of carbon dioxide and C is the current level. (Data from Clime, W., The Economics of Global Warming, Institute for International Economics, Washington, D.C.) (a) Use the equation R = 6.3 In() to determine the radiative forcing R, in watts per square meter (W) to the nearest tenth, expected by the IPCC if the carbon dioxide level in the atmosphere doubles from its preindustrial level. (b) Determine the global temperature increase T, in degrees Fahrenheit to the nearest tenth, that the IPCC predicted would occur if atmospheric carbon dioxide levels were to double, given T(R) = 1.03R. Search entries or author Unread 96 4444 ↑ Oll 7…
- 12. Calcium chloride is used:(There may be multiple correct answers!) A) As a hemostatic agent B) As an antidote for poisoning with salts of heavy metals B) As an antihistamine D) In dentistry - for taking impressions from the jaws E) In surgical practice - for blood clotting.As a concerned individual, this calls for an act to mitigate the problem on oceanacidification caused by anthropogenic emissions of CO2. In consideration to this perennialchallenge, we are left to answer a very important question: What can we do to help solve thisproblem? Your answer should consist at most five (5) sentences.NH3 and HCl gases sent simultaneously from both ends of a diffusion pipe are at one point of the pipe. encounters and this spot is observed as a white smoke due to NH4CI salt formation. a) Calculate the ratio of diffusion rates of NH3 to HCI theoretically. b) If the length of the diffusion pipe is 100 cm, point where the white smoke first appears is Calculate the distance from the tip (Mass numbers: N: the 14.0 g/mol, H: 1.0 g/mol, Cl: 35.5 g/mol)
- Identify the oxidizing agent in the chemical reaction 5Fe+2(aq) + MnO4-(aq) + 8H+(aq) 5Fe+3 + Mn+2(aq) + 4H2O(l) The answer is ……………………………… Calculate the total number of atoms in 500 Ml OF 0.200 M KNO3 solution. The answer is ……………………………… Mg has three stable isotopes. Given a sample of Mg with the following masses and percent abundances: 24Mg: 23.9850 amu, 58.42% 25Mg: 24.9858 amu, 15.22% 26Mg: 25.9826 amu, 26.36% The average atomic mass (in amu) is …………………… What mass of Na2SO4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M The answer is ………………………Route 1:RME = 82.92%MI= 1.34 Route 2RME = 93.33%MI = 1.57 Route 3RME = 57.34%MI = 1.89 Compare the value of Reaction Mass Efficiency (RME) and Mass Intensity (MI) generally, and choose which metrics is more significant in green measurement. Justify your answer.1 Ten (10) ml aqueous solutions of drug A (10% w/v) and drug B (25% w/v) are stored in two identical test tubes under identical storage conditions at 37°C for 3 months. If both drugs degrade by first-order, which drug will retain the highest percentage of initial concentration? (a) Drug A (b) Drug B (c) They will be the same.
