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As revealed in the screencast, the autionization of water is temperature-dependent.
At physiological temperature, the value of Kw is
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- Using the proper conversion factor, convert 8.4 ft? into cm2. ! cm? Save for Later Last saved 1 day ago. Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes. Part 3 The parts of this question must be completed in order. This part will be available Part 4 Te ortc of thic question must he comnleted in order This part will be availableesc pock Ethanol (C₂H6O) burns in air C₂H60) +O2(g) → CO2(g) + H₂O (1) Balance the equation and determine the volume of air in liters at 35°C and 790 mm Hg required to burn 227 g of ethanol. Assume that air is 21% O₂ by volume. Edit Format Table 12pt Paragraph control ! 1 Q A @ 2 N BIU AT²V W S # 3 X 1 option command E D $ 4 t R C ܀ % 5 F : T V MacBook Pro ➡ A 6 G Y & B 7. H (+) U 0 words *00 8 N J 1 ( 9 K M ) 0 O MOSISO goContent Google Do google slid X Dr. Ortiz a ☑ Certificate ☑ > Course EX Cengage L ☑ OWLv2 | O ✓ Search res ChatGPT ✓ + C prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator-assignment-take New Chrome available : E4 CH 16 17 and 18 [References] Question 1 1 pt Question 2 2 pts "Heater Meals" are food packages that contain their own heat source. Just pour water into the heater unit, wait a few minutes, and voilà! You have a hot meal. Mg(s) + 2 H2O(l) → Mg(OH) 2 (s) + H2(g) Question 3 1 pt Species AH° (kJ/mol) S° (J/mol·K) AƒG° (kJ/mol) Question 4 2 pts Mg(s) 0 32.67 0 Question 5 1 pt Question 6 × 2 pts H2O(l) Mg(OH)2(s) -285.83 69.95 -237.15 -924.54 63.18 -833.51 H2(g) 0 130.7 0 Question 7 1 pt Question 8 2 pts Question 9 1 pt HEATER MEALS Question 10 2 pts Question 11 1 pt Question 12 1 pt Question 13 Charles D. Winters INCLUDES 34 ou b HEATER MEALS 1 pt Question 14 1 pt The heat for the heater unit is produced by the reaction of magne- sium with water.…
- You are provided with a stock standard with a concentration of 100 mg/L, and a solution of unknown concentration. Prepare calibration standards using a 10 mL volumetric flask and a 1 mL piston pipette, and measure on the UV/Vis spectrophotometer (400 nm). Determine the concentration of the unknown after a 1:40 dilution, and provide the concentration of the initial solution. i need to learn how to do the calculations and draw a calibration curve to find concentration of unknown sample after i find the absorbances.Leaching of Oil from Soybeans in a Single Stage. Repeat Example 12.9-1 for single-stage leaching of oil from soybeans. The 100 kg of soybeans contains 22 wt % oil and the solvent feed is 80 kg of solvent containing 3 wt % soybean oi!. = 0.239, V, = 50.0 kg, x41 = 0.239, N, = 1.5 Ans. L, = 52.0 kg, ya1 wwwwwAll changes save 7. When two solutions are mixed, a color change occurs. The data tables show the time between mixing and the color change for two sets of conditions. For Condition One, the solution concentrations were constant and temperature varied. For Condition Two, the temperature was constant and concentrations varied. Condition One: Concentration Time for Temperature (°C) Sample Color to Change 1 10° 36 sec 22° 14 sec Condition Two: Temperature Time for Concentration Sample Color to % Change 1. 100% 15 sec 2. 50% 24 sec Which of these statements is true according to the data? O The reaction rate is greater at 22°C than at 10°C. O Reducing the temperature increases the rate of the reaction. The reaction is affected by changes in temperature not by changes in concentration. O Decreasing the concentration increases the reaction rate. PREVIOUS 17 of 25 NEXT SAVE & EXIT
- Blank determinations reveal errors due to interfering contaminants from the reaagents and vessels employed in the analysis.SrCl, Observations B|I|U X X + fx | ®| D e Normal Activated charcoal observations Normal BIU fx| 田=| || 的|| || In 1. Based on your understanding of color's relationship to wavelength, identify the approximate wavelength of light (nm) emitted by strontium when it was burned. (No quantitative data was collected for this; you are giving an approximate value only, based on what you observed.) Explain your reasoning in full, making sure to cite specific data and observations to support your answer. Normal BIIIU X:| X'|- EE = fx| DI e 2. While boiling potatoes for dinner in salted water, the pot boils over and you notice that the flame on your gas burner turns to bright yellow-orange. How would you explain the appearance of a color in the previously blue flame? Normal BIIU X X + 田=|IT| 3. What would you conclude about chloride based on your results in the flame tests? Xe | X° | → EI fx| fr DI e E E IT E IT Normal BIIU 4. Place the metal solutions you tested in order of increasing energy…_engine.html?ClassID=1752193328# What is the enthalpy of the reaction, in kJ/mol, knowing that 7.5 g KNO3 absorbs 2597 J of energy? KNO3 → K* + NO, qrxn = +2597 J %3D AHxn = [ ? ] kJ/mol Enter either a + or - sign AND the magnitude. Use significant figures. AH,rxn (kJ/mol) Enter
- 2- 3. Ch4 - Mastery Gmail с !!! X Canvas OWLv2 | Online teaching and l X docs.google.com/document/d/1TqDL3pNyiUclZ_7MKQ6brZDQFIAmOD1jfbX4SLstrel/edit Rangermail P University of Wisc... a se a A 100% Untitled document File Edit View Insert Format Tools Extensions Help 1 Normal text H Quizlet C chegg Verdana H I H₂N. I CI 1 I Untitled document - Google D X b Success Confirmation of Ques x + CH3 H I H 11.5 + H. H GPT P Student Center 2 -NH₂ Note that cis, trans isomers are an example of stereoisomers. Indicate whether the pair of structures shown represent stereoisomers, constitutional isomers, different conformations of the same compound, or the same conformation of a compound viewed from a different perspective. H CH3 H₂N- B I U A H I CI 3 ين - 4 Moncler NH₂| C + Pearson+ Public S... d = = ▶ Geo Book E Cengage Ochem 1 E EX 0 О н Update: ✓ Editing Share HThe concentration of acetylsalicylic acid in an antipyretic tablet was determined by HPLC using a normal calibration curve. Standard solutions of acetylsalicylic acid were prepared and analysed using a 10µL loop. The results obtained for the standards are tabulated below: Conc. of Acetylsalicylic Acid (ppm); Signal (arbitrary units) 50; 6352 100; 12869 150; 19175 200; 25536 250; 31936 To determine the concentration of acetylsalicylic acid in an antipyretic tablet, 10 tablets were weighed (6.500 g total) and crushed to a fine powder using a mortar and pestle. A quantity of powder equal the mass of one tablet was added to a 100 mL volumetric flask. The tablet powder was dissolved with 20 mL of methanol and the flask was made to volume using water. The solution was filtered. A 1.000 ml aliquot was transferred to a 10 ml volumetric flask, which was then made to volume with water. Analysis was conducted using a Bio Sil HL C18, 250mm x 4.6mm column; 5um, with a mobile phase of acetonitrile:…AutoSave We hw OFF ... Home Insert Draw Design Layout References Mailings Review View O Tell me R Share O Comments Calibri (Bo.. v 11 v A A E vE v E v E E Aa v AaBbCcDdEe AaBbCcD AaBbCcDdE AaBb AaBbCcDdEe BIU V ab A • I v A v Paste х, х E= == No Spacing Normal Heading 1 Heading 2 Title Styles Pane Dictate Sensitivity C13 NMR Peaks Aldehydes RCO)R Aldehydes and ketones Carbaxylic R(CO)X Carbaxylic acid derivatives Ntrile Nitrile RCN CC C-C Alkyne Akyne R-CC-R RCH20 RCH2-O R4C RAC R3CH R3CH RCH2X X= C-C, C-O, Br, CI, N RCH2X R2CH2 RECH2 RCH3 RCH3 TMS TMS 220 200 180 160 140 120 100 80 60 40 20 Typical chemical shifts in 13c-NMR 9) Why do the peaks of associated with aldehydes (both in H NMR and C NMR) appear so much further downfield than other peaks? C13 NMR Peaks E Page 5 of 5 E English (United States) O Focus 295 words 白
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