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- . In C.AJ = - kt.tln [A.o]. t¹/₂ = 0.693 K In = KE •1• [A]o⋅=⋅· 100 ·/. [A] + = left . CAJO. CAJE In. [100] [s] t =.kt K= 0.693 t¼½₂ CAJO t = |n² Ch t = ln [AG] ·K CAJO K= In [At]. t Formulas Problem: Na-24 has a half life of 15 hours. How much of a 20.09. ·Sample would remain after decaying for 60 hours? Plz explain step by step. using the formulas..Does it possible to use gravimetric analysis to quantiify certain parameters as indicators of quality in squash soup? If yes, please explain the processGravimetric analysis of Fe3O4 (MW = 232 g/mole) may be undertaken with the following reactions: Fe3O4 → Fe2O3 → Fe (OH)3. Weight of sample containing 8.00% Fe3O4 that must be taken to obtain a precipitate of Fe(OH)3 (MW = 107 g/mole) that weighs 150 mg is . a. 0.108 g b. 0.325 g c. 1.355 g d. 4.065 g Amount of Fe2O3 (MW = 160 g/mole) from which 150 mg of Fe(OH)3 (MW = 107 g/mole) may be obtained is . a. 0.112 g b. 0.224 g c. 0.448 g d. none of the other choices
- What is precipitation from homogeneous solution; what are the benefits of this method.3. Corev was synthesizing a chemical in the laboratory. He used different purification techniques to try to obtain a pure compound. The melting point of the pure compound is 65 degrees. When he tested his compound in the lab the melting point he obtained was 62-68 degrees. Is the product he synthesized pure? 4A company was low on copper metal and decided to use some chemical additives just this once to some copper wiring they were installing in a house. How will this impact the conductivity of the wiring?Table 9.3 (data) Ammonium Chloride (NH4Cl) 1,1,1-Trichloroethane (C2H3O2Cl) Copper (I) Chloride (CuCl) Monochloroacetic acid (C2H3O2Cl) Nickel (II) chloride (NiCl2) Table 9.4 (report) Solubility Classification Dissociation Classification NH4Cl C2H3Cl3 CuCl C2H3O2Cl NiCl 2
- 1. Calcium in a sample solution is determined by atomic absorption spectroscopy (AAS). A stock solution of calcium is prepared by dissolving 1.834 g CaCl, 2H,0 in water and diluting to 1 litre. From this stock solution, the second stock solution is prepared by the dilution factor of 10. Three standard solutions of calcium are prepared from the second stock solution with the following dilution factor: 20 (first standard solution), 10 (second standard solution) and 5 (third standard solution). A blank solution is prepared as well. Absorbance signals of AAS are as follows: 1.5 (blank solution), 10.6 (first standard solution), 20.1 (second standard solution), 38.5 (third standard solution), 29.6 (sample solution). (Molar mass; Ca = 40.00 g mol-, CI = 35.45 g mol-, 0 = 16.00 g mol-', H = 1.00 g mol-1) a. Construct ONE (1) plot that could be used to represent the calibration curve. b. From the plot of Q1a, determine the amount of calcium in parts per million.Consider the Solubility Curve for this Problem: Analysis for KClO3 & NH4Cl MW (KClO3) = 122.55 g/mol , MW (NH4Cl) = 53.49 g/mol i) What is the temperature at which KClO3 & NH4Cl both have the same solubility? Round to nearest degree. +/- 1° T = °C ii) What is the solubility (g per 100g H2O) at this temperature. Round to nearest gram. +/- 1 g s (KClO3) = g/100g H2O s (NH4Cl) = g/100g H2O iii) What is the molar solubility for KClO3 at this temperature? Assume the density of the solution is 1.21 g/cc. Round off to 2 sig. figs. |s| KClO3 = M iv) Calculate the Ksp for each of these chemicals at this temperature. Ksp = v) What is the unit of Ksp for KClO3? Unit for Ksp =The solubility of CaF, in water at 25 °C is measured to be 0.017 . Use this information to calculate K, for CaF,. sp Round your answer to 2 significant digits.
- Details Preparation of Dilute Table Solution Molarity of I₂ Standard Solution Molar Mass (g/mole) Ascorbic Acid Number of Tablets per Analysis Mass (g) Container plus 1 Tablet Mass (g) Container less 1 Tablet Mass (g) of 1 Tablet Volume (mL) of Dilute Tablet Solution Titrimetric Analysis of Dilute Tablet Solution Volume (mL) of Aliquot Portion of Dilute Tablet Solution Titrated Final Buret Reading (mL) Initial Buret Reading (mL) Volume (mL) I₂ Solution Delivered No. of mmol 1₂ Reacted No. of mmol Ascorbic Acid in Aliquot Total No. of mmol Ascorbic Acid Present in the Volumetric Flask Total Mass (mg) of Ascorbic Acid Present in 1 Tablet Average Mass Ascorbic Acid/Tablet Deviation Standard Deviation Coefficient of Variation (%RSD) Reported Composition of Tablet Trial 1 50.00 11.64 0.20 0.02512 M 176.14 1 12.2546 11.7824 0.4722 250.00 Trial 2 50.00 22.80 11.64 Trial 3 250 mg Ascorbic Acid/Tablet 50.00 11.20 0.00 mg Ascorbic Acid/TabletWrite the balanced NET ionic equation for the reaction when aqueous Cs3PO4 and aqueous AgNO3 are mixed in solution to form solid Ag3PO4 and aqueous CSNO3. Be sure to include the proper phases for all species within the reaction.pneumonia is characterized by fever (a body temperature) does the patient have a body temperturr that indicates that he has pneumonia? justify your answer with suitable caculation PLEASE.
