DGD 6

Name: Lyna Ammi Date: 1/26/2022 Section: 02L Data Report Sheet: The Reaction of Methyl Violet with NaOH: A Kinetic Study 3. What is the value of k"?

Read and interpret the following information using the following abstract from a scientific journal article. In 2-3 sentences, summarize what you understand from this research

Please don't provide handwritten solution ....

Scientists study the impact of changing only one component of a cancer treatment in a laboratory. Which of the following describes the study? controlled experiment observational study conceptual model computational study

Chapter 13 is a Homework question. question 47. Please explain how can I do it without graphing it because if this question comes on the test how can I quickly solve this question without any graph and do it mathematically? If possible can you make a video? Thank you.

PERTINENT CALCULATIONS Remember: rate = k[C25H30CIN3]"[OH_]" where n =0 since excess OH was used. n3= 1. Refer to your graphs and complete table below Linear correlation (r- value) Graph Kinetic Run I Kinetic Run II Average r- value absorbance vs time 0.9972 0.9955 0.9964 In (absorbance) vs time 0.9978 0.9994 0.9986 2/(absorbance) vs time 0.9805 0.9879 0.9952 2. Based on the average linear correlation (r2 -value) the reaction order, m, with respect to crystal violet, CV, is Explain. 3. Write the rate law. 4. The slope, and therefore pseudo" rate constant, kr', is at T1. CC, and ko' is at T2

Not all XO molecules such as NO, survive long enough to react with oxygen atoms; some are photochemically decomposed to X and atomic oxygen, which then reacts with O, to re-form ozone. Write out the three steps (including one for ozone destruction) for this process and add them together to deduce the net reaction. Does this sequence destroy ozone overall, or is it a null cycle, which is defined as one that involves a sequence of steps with no chemical change overall?

Read the following short piece titled "The Status of Qualitative Research in Criminology." by Jody Miller, read pages 69- 72. Discuss the validity and reliability issues in relation to qualitative studies.

A certain amount of insecticide is washed out into the lake on June 1 , leading into concentration of 5.0 x 10-7 g/mL. What is the concentration of the insecticide in water on June 1 of the following year? The half-life of an insecticide in water is 0.0154 year. Solve with complete solution.

Host E Chen = 11C |= 11C|| S Ancie G timel G scien G differ Dino 2 BoneG pictu + Why om/d2l/Ims/quizzing/user/attempt/quiz_start_frame_auto.d21?ou=D3336147&isprv=&drc3D0&qi=3151427&cfql=D0&dnb3D0&fromQB= ct Values shlee Garcia: Attempt 1 b. Given the mass of the asteroid to be (7.586x10^14) in grams and the diameter of the Earth (1.28x10^4) in km. Calculate the expected distribution of asteroid dust over the surface of the Earth in grams per cubic centimeter(g/cm2). Note: The your answer is assumed to be reduced to the highest power possible.(This means that everything is in scientific notation) When entering units for the answer, use the symbol for the unit, and if the unit has an exponent, enter the exponent as a carat(^). For example, grams would be "g" and, the unit grams per centimeter squared would look like, g/cm^2. %3D Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer units 330F 20 dy

How was Thin Layer Chromatography (TLC) used in organic synthesis reactions ? TLC is used to find the exact concentration of a catalyst in the reaction. TLC can speed up a reaction because silica gel is polar. TLC can separate components of a reaction mixture such as starting materials and products allowing the experimenter to identify what compounds are in the reaction mixture. TLC is used to find percentage yield of the reaction.

Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5,730 years. Vegetation absorbs carbon dioxide through the atmosphere, and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon, and the amount of 14C present begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially. Dinosaur fossils are too old to be reliably dated using carbon-14. Suppose we had a 66 million year old dinosaur fossil. What percent of the living dinosaur's 14C would be remaining today? (Round your answer to five decimal places.) 0.0000007537 X % Suppose the minimum detectable amount is 0.2%. What is the maximum age (in years) of a fossil that we could date using 14C? (Round your answer to the nearest year.) yr

Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5,730 years. Vegetation absorbs carbon dioxide through the atmosphere, and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon, and the amount of 14C present begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially.   a) Dinosaur fossils are too old to be reliably dated using carbon-14. Suppose we had a 67 million year old dinosaur fossil. What percent of the living dinosaur's 14C would be remaining today? (Round your answer to five decimal places.)   b) Suppose the minimum detectable amount is 0.7%. What is the maximum age (in years) of a fossil that we could date using 14C? (Round your answer to the nearest year.)

Scientists can determine the age of ancient objects by the method of radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about 5,730 years. Vegetation absorbs carbon dioxide through the atmosphere, and animal life assimilates 14C through food chains. When a plant or animal dies, it stops replacing its carbon, and the amount of 14C present begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially. Dinosaur fossils are often dated by using an element other than carbon, like potassium-40, that has a longer half-life (in this case, approximately 1.25 billion years). Suppose the minimum detectable mass is 0.4% and a dinosaur is dated with 40K to be 67 million years old. Is such a dating possible? What is the maximum age (in millions of years) of a fossil that could be dated using 40K? (Round your answer to one decimal place.) (Can you…

но HO Но HO co + ½ 0, - + H,O H" H но Он ascorbic acid dehydroascorbic acid Vitamin C is oxidized slowly to dehydroascorbic acid by the oxygen in air. It is catalyzed by ions such as Cu*2 and Fe*3. The reaction can be followed by measuring the ultraviolet absorbance at 243 nm. Time (hours) Absorbance (A) 1/A In A - In A 0.75 1.3 -0.29 0.29 1 0.38 2.6 -0.97 0.97 0.19 5.3 - 1.7 1.7 3 0.095 11 - 2.4 2.4 27. Which of the following is the best interpretation of the data given above? (A) The data support a zero-order reaction. (B) The data support a first-order reaction. (C) The data support a second-order reaction. (D) The overall order is third. 28. A new compound is synthesized and found to be a monoprotic acid with a molar mass of 248 g/mole. When 0.0050 moles of this acid are dissolved in 0.500L of water, the pH is measured as 2.94. What is the pk, of this acid? (A) (В) (C) (D) 2.33 3.89 5.78 7.78 29. What is the hybridization of carbon 1 (far left) and carbon 2 (middle) in this…

Complete the following reaction:   27Al13   +  α  →   30P15 P  + _______

Pb

Experiment Initial Initial Initial rate/ concentration concentration mol dm-3 s-1 of A/mol dm-3 of B/mol dm-3 1 0.16 0.20 5.0 x 10-5 2 0.24 0.20 7.5 × 10-5 3 0.32 0.10 10.0 x 10-5 4 0.12 0.16 Determine value of X. Select one: O a. 2.50 x 10-5 O b. 3.00 x 10-5 О с. 3.75 х 10-5 O d. 4.00 x 10-5

B. Rates of reaction are typically measured as the change of concentration per unit time. Some typical units of concentration are: M, mM, pM, µM, nM. Some typical units of time are: years, days, hr, s, ms, ps, µs, and ns. For each reaction, suggest a reasonable unit of measure for the rate of reaction. a. The combustion of gasoline. b. The transformation of organic material into crude oil. Chemical change involved with memory in the human brain. с. d. The rusting of an iron nail. 9. Why would a scientist use nM/ps instead of M/s? - 112 -