4.1 Activity

You are trying to come up with a drug to inhibit the activity of an enzyme  thought to have a role in liver disease. In the laboratory the enzyme was shown to have a Km of 1.0 x 10-6 M and Vmax of 0.1 micromoles/min.mg measured at room temperature. You developed an uncompetitive inhibitor. In the presence of 5.0 x 10-5 M inhibitor, the apparent Vmax  was determined to be 0.02 micromoles/min.mg. What is the Ki of the inhibitor?

1) Listen The Ksp value for calcium sulfate [CaSO4] is 2.40 X 10-5 and a professor made 1825 mL of a CaSO4(ag) solution but then one of his graduate student accidentally poured in a 0.125 M solution of calcium phosphate [Ca3(PO4)2] solution. You may ignore the additional volume coming from the Cag(PO4)2 solution to make the calculation simpler. Now that you have calculated the new equilibrium constant (K) with this common ion effect then which way will the chemical equilibrium shift? need more information to be determined at equilibrium chemical equilibrium will shift to the right first and then to the left chemical equilibrium will shift to the right chemical equilibrium will shift to the left 201591..docx LAB EXP. #3 -..docx Show All

1-arr In a study of the gas phase decomposition of phosphine at 120 °C PH3(g)- →1/4 P4(g) + 3/2 H2(g) the concentration of PH3 was followed as a function of time. It was found that a graph of In[PH3] versus time in seconds gave a straight line with a slope of -2.50×10² s1 and a y-intercept of -3.24. Based on this plot, the reaction i v O order in PH, and the half life for the reaction is seconds. zero first second

106CO2 + 50 SiO, + 16HNO, + H,PO, + 0.001FE + 122H,O → (CH,0),06(SiO,)so(NH3),e(H3PO,)Feo.001 + 13802 a. Calculate the change in (total) CO, in the ocean surface mixed (Temp = 25C, Salinity = 35 ppt) layer if 1 nM of iron is added (and consumed), assuming it is indeed the limiting nutrient. %3D b. Would this change in total CO, affect the alkalinity of the surface ocean? Why/why not? c. How much would the pH of the surface change following this primary production (assuming no respiration/gas exchange)? Use pCO2 = 420 ppm and total alkalinity = 2.2 mM to start your calculations. %3D

Enter the expression 147N+α714N+α, where αα is the lowercase Greek letter alpha. Express your answer as a chemical expression..

Calcium phosphate is used as an antacid, supplement, and/or a source of calcium and phosphate in toothpaste. In a laboratory setup calcium hydroxide can be reacted with phosphoric acid to produce calcium phosphate with water as by- product. In an experimental process, there are three procedures to deal with in the production of calcium phosphate. Procedure 1: 846.0 grams of calcium oxide and 264.0 grams of water are combined in order to produce a single product, calcium hydroxide. Procedure 2: 979.0 grams of diphosphorus pentoxide and 323.0 grams of water are combined in order to produce a single product, phosphoric acid. Procedure 3: Actual mass of isolated calcium hydroxide from Procedure 1 and actual mass of isolated phosphoric acid from Procedure 2 are combined in order to produce calcium phosphate with water as by-product. It is also noted that each procedure had the following percent yields: Procedure 1: 53.58% yield on calcium hydroxide. Procedure 2: 59.26% yield on phosphoric…

The compound diborane (B2H6) was at one time considered for use as a rocket fuel. Its combustion reaction is B2H6(g) + 3 O2(l) → 2 HBO2(g) + 2 H2O(l). The fact that HBO2, a reactive compound, was produced rather than the relatively inert B2O3 was a factor in the discontinuation of the investigation of the diborane as a fuel. What mass of liquid oxygen (LOX) would be needed to burn 234.4 g of B2H6? Answer in units of g. (part 2 of 2) What mass of HBO2 is produced from the combustion of 94.7 g of B2H6? Answer in units of g.

QUESTION 10 A student combined two colorless chemical compounds in a test tube. Immediately a yellow solution formed. When the student cooled the test tube the solution once again turned colorless. Was the reaction exothermic or endothermic? Explain, clearly and concisely, how you arrived at your answer. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac), T T T Arial 3 (12pt) -T-= - E Path: p Words:0

An exposure assessment study was conducted in a nail salon. Previous studies have indicated that airborne concentrations of methyl methacrylate are approximately 1 ppm. If the LOD of the analytical method is 0.25 ug and sampling should be conducted at a flowrate of 0.01 LPM, what is the minimum amount of time the sample should be collected to achieve a detectable concentration? Note: Methyl Methacrylate MW=100.1 g/mol A. 11.2 Minutes B. 2.7 Minutes C. 8.5 Minutes D. 6.1 Minutes

to Johnston Commun X Rh Blackboard Collaborate Ultra - x > General Psychology-Fall 2021 A ALEKS - Griffin Barden - Learn + A www-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IJczzdcvSCzsqTCIDqNGV3bKqhMfPmUcQ4ENkmiXn9QCwgeDPDkQ06yszYWESPcekwLO-Qg619rekU7404HgFAGbEZa Dr080?1 oBw7QYjlbavbSPXtx-YCjsh_7mMmrq#item O THERMOCHEMISTRY Griffin Calculating a molar heat of reaction from formation enthalpies Using the table of standard formation enthalpies that you'll find under the ALEKS Data tab, calculate the reaction enthalpy of this reaction under standard conditions: 2C,H;(g)+70,(9)→4 CO,(g)+6H,O() Round your answer to the nearest kJ.

what is the concentration of the unknown sample using serial diluitions: 0.05M 1.7472nm, 0.025M 0.8569nm, 0.0125M 0.4167nm, 0.00625M 0.1958nm the epsilon value is 0.0101 and l is 1 cm

I need answer expert solutions and step by step

Application of Material 100 Okay, you can get out your books, notes, or whatever else you would like (okay, except other people). Show your work, as I will give credit for anything you do correctly (if you are need it is easier for me to determine if you do something correctly). If you need to make assumptions, specify what they are. 1. A reaction 2A+B P was determined to be 2/3 order with respect to B, and Oth order with respect to A, with a rate constant of kr 3.892 x 10-5 M1/3 s-1. (35 points) = - (a) For this reaction, derive the integrated rate law with respect to A, B, and P. (b) For this reaction, determine the amounts A, B, and P present after 500, 1000, 1500, 2000, 2500, and 3000 seconds (assuming no intermediate exists). [A] = [B]o = 1.00 x 10-2M. (You might want to use excel or similar software to do this. (c) Based on your data, use excel or similar software to prepare a plot of concentration vs time for A,B, and P. (d) Determine the rate constant for the reaction. (e)…

Strontium phosphate, Sr3(PO4)2Sr3​(PO4​)2​, dissociates when placed in water. This compound has a solubility of 0.112 mg/L in water at 20 °C.   Calculate the Ksp of Sr3(PO4)2Sr3​(PO4​)2​. Please write your answer using scientific notation according to the following format: 0.0010 would be writen as 1.0*10^-3.

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The light absorbance A of a molecule in solution is measured as a function of concentration [X]. [X]/M                             A                            0                                     0 1.0 × 10–4                      0.157 3.0 × 10–4                      0.482 5.0 × 10–4                      0.713 7.0 × 10–4                      1.15 9.0 × 10–4                      1.37 Use spreadsheet software to graph the data and calculate a best–fit linear trendline. What is the equation of the line that best fits the data?   Question 5 options:   A = (1.55 × 103 M–1) [X] + (4.93 × 10–4)   A = (1.13 × 103 M–1) [X] + (2.52 × 10–4)   A = (9.94 × 102 M–1) [X] + (3.81 × 10–4)

You continue with the Arrhenius Plot with the slope of the curve to be approximately -12,500 K and the Arrhenius factor of 4.367 E10 hours^-1. What is the shelf life of the drug at 22 C? What is the shelf life at 4 C? Did your coworker achieve a century shelf life in either storage condition? Be sure to show your calculations. Arrhenius Plot In (k) -8 -10 -12 -14 -16 -18 0.0026 0.0028 0.0030 1/T 0.0032 0.003

How do i calculate e for lab and how would i calculate A? how do i set it up ? thank you !

Given the Ksp for Ag2CrO4 is equal to 1.20 x 10-12, calculate the percent error in your experimentally determined value for average Ksp (this will be an extremely large percentage – think about why).

professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/mol

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