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A:
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- Density of solution:Trial 1: 1.2 g/mLTrial 2: 1.2 g/mLTrial 3: 1.2 g/mL Average density = 1.2 g/mL What is the relative average deviaion, %?ⒸMacmillan Learning What is the concentration of a solution made by diluting 45 mL of 6.0 M HCl to a final volume of 750 mL? 80 F3 concentration: $ 4 288 F4 % 5 T F5 ^ 6 MacBook Air F6 & 7 - F7 11 00* 8 DII F8 ( 9 DD F9 O ) O. O F10 P 3) F11 { + r = F12 M deletechemy 101 final exam sec sem Soved 22 Be sure to answer all parts. X 02:04-55 How would you prepare 475 mL of a 0.736 M NAOH solution, starting with a 5.99 M stock solution? Volume of stock solution needed: mL Volume of wvater needed: mL
- assignmentProblemID=142966924&offset3=next CHE154-H Gen Chem II Bronikowski S20 Part A Determine the percent ionization of a 0.245 M solution of benzoic acid (K, = 6.5 x 1) Express your answer using two significant figures. > View Available Hint(s) 1 ΑΣφ ха Хь х IXI X•10" Submit Previous AnswersMX (Ksp = 2.42x10-11) Express your answer in moles per liter. S = Submit Part B S = IVE ΑΣΦ PbCl2 (Ksp = 1.17x10-5) Express your answer in moles per liter. Part C Request Answer Submit Request Answer S = 15| ΑΣΦ Ca(OH)2 (Ksp = 4.68x10-6) Express your answer in moles per liter. IVE ΑΣΦ Submit Request Answer www wwwww ? ? ? M M MHow many liters are in a 0.115 M solution containing 1.55 moles of dissolved KBr? (AKS 5c) 0.18 L 0.074 L 21.56 L 13.48 L 99+ 180122-ICT DG521 A PrtSc Insert F5 F6 F7 F8 F9 F10 F11 F12 & 5 6 T. Y 11 H. J K + II . * CO
- Ex .6 Spectrophotometric Analysis of a Commercial Aspirin Tablet A) Standard solution and Beers law calibration curve 1-Fill in the following table : Concentarion For S.1 Me x Ve Max V₁0.000325 x 1.0ml - Ma x 10.0ml Solution S. 1 S.2 S.3 S.4 ASA of unknown 2- Plot a graph of Absorbance vs. concmol/L absorbance 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 Absorbance 0 2 Absorbance vs. Cocentration 4 B) Analysis of unknown aspirin tablet 1.Mass of aspirin tablet= 2.Concentration of ASA unknown from calibration curve g Concentration ????????? 6 3. .Conc of Stock ASA unknown = 50 ml / 1.5 ml (D.F) x Conc of ASA unknown=..... mol/L 4. Moles of ASA in 100 ml solution - Concof Stock ASA unknownx 0.1 L = 5.Mass of ASA = moles ASA x Molar Mass ASA (180 g/mol) = 6.% of ASA in aspirin - Mass of ASA/ Mass of aspirin tablet x100 = 8 mol/L g 10 conc. mol/Lx 104 moles OY-Values %Table of chemicals and reagents with their physicochemical properties (name, molecular formula, molecular weight, pKa, melting point, boiling point, etc.) Write a short outline or a flow diagram of the procedure List and safety issues Read and understand the MSDS information for each chemical used in this practical Experimental procedure Please do not scratch the clear sides of the UV cuvettes as this will invalidate your results. Part 1: Preparation of a calibration curve A calibration curve should be constructed using at least five concentrations of the pure paracetamol standard supplied in the range 3-15 ug/mL as follows: Weigh about 150 mg of paracetamol accurately and transfer to a 200 mL volumetric flask. Add 50 mL of o.1 M NaOH and dilute to about 100 mL with deionised water (DI). Shake and make up to volume with DI water. Dilute 10 mL of the resulting solution to 100 mL (volumetric flask) with DI water (= stock solution). Prepare standard solutions containing 3, 6, 9, 12 and 15…Answer is provided. All I need is solution. Thank you From the following formula or a progesterone nasal spray,6 calculate the quantity of each ingredient needed to prepare twenty- our 15-mL containers of the spray. Progesterone 20 mg Dimethyl-b-cyclodextrin 62 mg Purified water, ad 1 mL Answer: 7.2 g progesterone 22.32 g dimethyl-b-cyclodextrin ad 360 mL, purified water
- 30.8 mg NaCl in 127 5 mL of solution Express the molarity in moles per liter to three significant figures • View Available Hint(s) M(NaCl) = Submit Provide Feedback F6 F7 F8 F9 F10 F11 24 Aookmarks d My Ho 1 ои х C|Cheg keAssignment/takeCovalent Activity.do?locator-assignment-take eq M M -eq Ereg Preq 2req 2req 2req 2req 2req Profiles Tab Window Help Paraph Paraph A very ► Hey D 80 F3 th 122 Quiz 5.pdf ^ Submit Answer Solubility of Ionic Compounds Classify each of the compounds as soluble or not soluble: soluble silver acetate soluble sodium nitrate not soluble chromium(II) sulfate a F4 ост 12 . OL Math 122 Quiz 5.docx tv Retry Entire Group 9 more group attempts remaining 9 A ♫ F5 Use the References to access important values if needed for this question. A Nil Micros H F22-Chem-103x....pdf MacBook Air F6 F7 One S ► 11 FB Untitle O 15 Fel-F22-Chem-1....pdf W F9 3 Gram G Classi Aa e F10 < EmailatsPen Part A If 122 mL of al1 M glucose solution is diluted to 550.0 mL , what is the molarity of the diluted solution? Express your answer using two significant figures. VO AEO M Submit Reguest Answer Provide Feedback P Pearson
