Report Submission - Directionality vs

The experiment involves diluting a 16% sugar solution, prepared by dissolving 16 g of sugar in 100 mL  water.  Three different solutions are prepared by mixing the 16% sugar solution with various volumes of water.Make appropriate choices from the dropdowns.  Work from left to right.  Each answer can be calculated from numbers to the left of it in the row. The objective is to calculate the number in the right-hand most column in each row (% sugar in the solution). 16% sugar solution taken / mL water added/ mL diluted solution / mL Dilutionfactor % sugarin diluted solution 25 25                             [ Select right answer]                          ["50", "25", "100", "150"]                                        [ Select right answer]                          ["1", "0.5", "2"]                                        [ Select right answer]                          ["8", "50", "12.5", "25"]            25 8.3                             [ Select right answer]…

STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.

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MULTIPLE CHOICE: Choose the letter of the best answer Please answer all questions correctly 1. The standardization of volumetric solution does not require hydrochloric acid. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 2. In the standardization of its volumetric solution, the primary standard is dried to constant weight, which means drying shall be continued until two consecutive weighings do not differ by more than 0.50 mg. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 3. In the standardization of its volumetric solution, potassium iodide was added to A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E.All of the choices 4. Starch is the indicator of choice for these procedures because it forms intense blue coloration with the solution. A. Permanganometry B. Cerimetry C. Iodimetry D. lodometry E. C and D 5. In the standardization of its volumetric solution, the reaction needs to be…

Current Attempt in Progress From the curves shown in Animated Figure and using the following Equation, determine the rate of recrystallization for pure copper at the several temperatures. Make a plot of In(rate) versus the reciprocal of temperature (in K-1). (a) Determine the activation energy for this recrystallization process. (See Section FACTORS THAT INFLUENCE DIFFUSION.) (b) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K). (a) i kJ/mol (b) i days

Calculations: a) Average the two closest burette readings. Average all three readings if they agree within + 0.25 ml. b) Write the chemical equation for the reaction of acetic acid with sodium hydroxide. c) Calculate the amount (in moles) of sodium hydroxide that you needed to reach the equivalence point. Then calculate the concentration of acetic acid in the vinegar. d) Find the molar mass of acetic acid. Then calculate the mass of acetic acid in the volume of vinegar you used. e) The density of vinegar is 1.01 g/ml. Calculate the mass of the vinegar you used. Then find the percent (m/v) of acetic acid in the vinegar. Discussion: a) Compare your results with other students. What can you conclude about the concentration of vinegar you and the rest of the class used? b) Discuss how accurate you believe your results to do and any possible sources of error. c) Phenolphthalein was used as an indicator. Why should we place the vinegar, rather than sodium hydroxide, in the Erlenmeyer flask?…

Multiple choice. Please check my asnwers from numbers 5-9 if they are correct. Thank you!

PAPER CROMATOGRAPHY • Define chromatography • Demonstrate an understanding of the process of chromatography • Describe the steps involved in a chromatography investigation Explanation Coloured inks are often made up of several different inks. Each colour of ink will get carried a different distance by the water, allowing you to see all of the different inks. Try this with different colours to see what actually goes into a colour. This technique is called chromatography and can be used in chemistry to find out what is in an unknown mixture. II. Materials .Felt tip pens (non-washable) . Kitchen roll .A bowl or cup . Water • Scissors III. Health and safety • Make sure that you thoroughly clean any equipment after the experiment before using for food IV. Procedure Method 1 1. Take a sheet of kitchen roll and draw a simple picture with a non-washable felt tip pen. 2. Place the sheet over an empty bowl. This is to keep the paper from getting too wet. 3. Carefully add a few drops of water…

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

Before  Investigating the scene the technician must dilute the luminol solution to a concentration a 2.00 × 10-2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00L of the diluted spray?

Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 8.00x102 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units. • View Available Hint(s) Tempjetes Symbols undo redo Teset keyboard shortcuts Help Value Units moles of luminol =

I need help understanding how to do this, can you please show me how you get the CFU/mL

Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3 #1 (salicylic acid) clear lilac 100% #2 (commercial aspirin A) clear slightly pink 50% #3 (commercial aspirin B) clear lilac 95% #4 (aspirin from your clear pink 20% synthesis above) #5 (control) clear clear 0% Based on this data and the melting point of Aspirin, how pure is the synthesized product?

Part A: Standardization of Potassium Permanganate, KMnO4 Solution Your Data Group I Group II Group III Mass of Na2C2O4 used 0.23 9 0.30 g 0.22g 0249 Initial buret reading Om L 3 mL 0 mL 0 mL Final buret reading 36.6 mL 28 mL 31.3mL 51.1mL Volume of KMnO4 used 36.6 mL 50 mL 31.3 mL 51.1mL 25+25

For each of the following scenarios, determine if the error will cause the molarity of the hydrochloric acid to be greater than, less than, or the same as the initial value. A: A student adds 50 mL of water to the reaction flask with unknown hydrochloric acid instead of the 25 mL sated in the procedure. B: A student adds 50 mL of water to the reaction flask with unknown hydrochloric acid instead of the 25 mL stated in the procedure. C: A student doesn't notice the some of the HCL has dripped out from the volumetric pipet when transferring to the reaction flask

Because of the risk of lead poisoning, the exposure of children to lead-based paint is a significant public health concern. Thefirst step in the quantitative analysis of lead in dried paint chips is to dissolve the sample. Corl evaluated several dissolution techniques.24 In this study, samples of paint were collected and pulverized with a Pyrex mortar and pestle. Replicate portions of the powdered paint were then taken foranalysis. Results for an unknown paint sample and for a standard reference material, in which dissolution wasaccomplished by a 4–6-h digestion with HNO3 on a hot plate, are shown in the following table. (a) Determine the overall variance, the variance due to the method, and the variance due to sampling. (b) What percentage of the overall variance is due to sampling? (c) How might the variance due to sampling be decreased?

Could you help me with question one please?

Dipping into health When blood pressure is measured over a 24-hour period, this is referred to as ambulatory blood pressure monitoring, three patterns arise. Here are samples of three different individual. Let's call them Dick (1), Tom (2) and Harry (3). 1 2 3 Patient's Paticnt's BP BP Palicet's Upper limit Upper limit 12 Upper lim 124 120 Lower limit Lower Lower limit Time (houn after wakening) Time (hours after awakening) Time (hours after awakenin SYSTOLIC BP (mm Hg)

Calculate the cfu per ml of each dilutions and cfu per ml of the stock suspension (highlighted below). Show your solutions.

urses/55527/quizzes/401369/take → # 3 Complete the data table using the calculation process you used to complete the previous question. Be sure to keep a copy of the completed table to include in the lab report for this experiment. $ Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 4 1.00 M Acetic Acid volume HC₂H3O2 25.0 mL 25.0 mL 25.0 mL 25.0 mL 25.0 mL Q Search f5 % moles 5 f6 Mole Ratio 6 HC₂H3O2 : NaHCO3 3:1 2:1 *All values should contain three (3) significant digits. 1:1 1:2 1:3 U hp NaHCO3 Molar Mass: 84.007 g/mol moles fg * 99+ 8 a fg mass needed DO 9 f10 ► 11

Mass of NaCl- 2.0139g

26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50

1. Answer the following questions based on the table: Pickling Vinegar Conc NaOH (M) 0.1005 Trial #1 Trial #2 Trail #3 Trial #4 Volume Vinegar (mL) 2.00 2.00 2.00 2.00 Initial Volume NaOH (mL) 0.32mL 0.22 1.02 0.44 Final Volume (mL) 24.25mL 24.20 25.00 24.45 Volume NaOH added (mL) 23.93mL 23.98mL 23.98mL 24.01mL a) Calculate the Average Volume NaOH used...show the trials that have %difference within 1% of each other. If you need to discard any trials- make sure to note this. b) Mass percentage of acetic acid in vinegar using your average volume of NaOH from Q1: (include a balanced reaction equation and show all work) c) % error calculation. Show ybur work in full. See Appendix B for details. (Reminder: Regular vinegar is 5.25% listed on bottle, pickling vinegar is 7.34% listed on bottle) d) In the titration of vinegar, a student uses 12.36 mL of NaOH(aq) (Molarity 0.100 M) to titrate a 2.00 mL sample of vinegar. If the student used lithium hydroxide (Molarity: 0.200 M) instead, what…