MED7590 week 6 assingment 1

What is Donnan's theory? What is its importance in biophysical chemistry?

2 What is reservior in environmental chemistry? What are O1D (O singlet D) and O3P( O priplet P)? Not sure if it's written in this way.

A certain half-reaction has a standard reduction potential E =-1.25 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at least 0.80 V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer requires this half-reaction to happen at the cathode of the cell. h Data Ag+ (aq) + e Ag (s) 0.7996 Is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? yes, there is a minimum. Ered = v !! Al3+ (aq) + 3e-- Al (s) -1.676 Au+ (aq) + e Au (s) 1.692 If so, check the "yes" box and calculate the minimum. Round your answer to 2 decimal places. If there is no lower limit, check the "no" box. Au3+ (aq) + 3e - Au (s) 1.498 O no minimum Ba2+ (ag) + 2e - Ba (s) -2.912 Brz (1) + 2e- 2Br (aq) 1.066 Ca2+ (ag) + 2e - Ca (s) -2.868 Is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have? E=…

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

1. CzH5OH(I) + HCOOH(I) → HCOOCzHs + H2O(I) 2. C₂H5OH(1)→ C₂H4(g) + H₂O(1) 3. C₂H4(9) + Cl₂(g) → C₂H4C12(1) 4. C6H6(1) + Br2(1)→ C6H5Br(1) + HBr(g) 5. 2C4H10(9) + 130₂(g) → 8CO₂(g) + 10H₂O(1) 6. 2C7H8(1) + 150₂(g) → 14CO(g) + 8H₂O(1) Match each equation above with its reaction type. Reaction Type Addition Complete combustion Elimination Esterification Incomplete combustion Substitution Reaction Number from Above → ◆ ◆ Fill in the blanks to complete the following statement. One method used to differentiate between saturated and unsaturated compounds is to add a few drops of orange-coloured aqueous bromine to samples of each organic compound. If the compound is ◆ the orange colour will quickly fade.

student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

Dr. X claims that she has found a new remedy (carrot extract) to cure acne. She scores an interview with the science writer for a local newspaper, and gets a brief article written about her and her claims in that newspaper. The article does not contain any experimental evidence, but mentions that Dr. X accidentally splashed some carrot extract on her face and found that the acne was reduced a few days later. Student Y finds the article and cites it as a source for a paper he is writing for class, as evidence that acne has been cured. (a) Is this finding a fact, a theory, a hypothesis, or an observation? Explain why you think so. (b) Was it OK for Student Y to use the newspaper article as evidence for his paper? Explain why or why not.

Sign in to edit and save changes to this file. 1. 121 49ln→ 121 + "5oSn 2. 8Be → 2_ 3. 1°4BE → °1B + 4. 8437Rb → °+1e + 128 128 5. 55CS→ 54Xe 6. 131m "s6Ba → oy + 7. 23793Np →42HE + ...

classify the elements according to their role in biological system (400 words)

IXL Search topics and skills Learning Diagnostic Analytics Science Soc Skill plans Math LE Language arts Recommendations Eighth grade > * E.5 Classify elementary substances and compounds using chemical formulas EHR Select all the elementary substances. cobalt (Co) phosphorus tribromide (PBR3) tungsten carbide (WC) ferrous oxide (FeO) Submit 2 3 7 8

Why do you need to study chemistry? How is it applicable to your course which is Criminology? In ten (10) sentences.

Can you help me step by step with number 8 part A, part B, part C? Can you explain it to me?

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 -

8 Welcome, Ayann IXL Search topics and skills Learning Diagnostic Analytics P Recommendations 1 Skill plans A Math O Language arts Science Social studies E Common Core Eighth grade> * E.5 Classify elementary substances and compounds using chemical formulas EHR Que ans Select all the compounds. 1 rhenium (Re) carbon monoxide (CO) TI elap glucose (C,H,206) PAU sodium hydroxide (NaOH) Challe Stage Submit Get 5 co in a n CI & $4 4. %23 8 t e h b C

text Roboto BIUA 12 1三 主 2. 4. Baking soda is an essential ingredient for most bread recipes. Without baking soda, describe how bread would be different. You may focus on taste, texture, bake time, color, size, or any other relevant characteristics in your response.

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 27.1 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?

Chemistry (2023) Q1B2

Explain very well with proper explanation please Asap

For the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected.   t (minutes) [N2O5] (mol/L)   0 1.24 x 10–2   10 0.92 x 10–2   20 0.68 x10–2   30 0.50 x 10–2   40 0.37 x 10–2   50 0.28 ´ 10–2   70 0.15 ´ 10–2         The initial rate of production of NO2 for this reaction is approximately:   A) 6.4 x10–4 mol/L • min   B) 3.2 x10–4 mol/L • min   C) 1.24 x 10–2 mol/L • min   D) 1.6 x 10–4 mol/L • min   E) none of these

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 34.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?   -don't prematureley round

▼ Part B 2NO3(aq) +8H(aq) + 6e 3Fe(s) + 2NO3 (aq) +8H+ (aq) 3Fe(s)→→3Fe²+ (aq) + 6e →>> 2NO(g) + 4H₂0 (1) →3Fe²+ (aq) + 2NO(g) + 4H₂O(1) IVE ΑΣΦ Calculate El using the tabulated standard electrode potentials at 25 °C. cell Express your answer in volts to three significant figures. Eeell= 1.21 SWE Submit Previous Answers Request Answer 2+ X Incorrect; Try Again; 4 attempts remaining ? V stontiol buoubtrooting the electro na