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- 6-40 What is the molarity of each solution? (a) 47 g of KCI dissolved in enough water to give 375 mL of solution (b) 82.6 g of sucrose, C12H22O11, dissolved in enough water to give 725 mL of solution (c) 9.3 g of ammonium sulfate, (NH4)2SO4 dissolved in enough water to give 2.35 L of solutionN 1 on 6. How many grams of KMnO4 are needed to prepare 75.0 mL of 0.350 M KMnO4? (4 pts.) r 2 W S X H cmd # 3 E D C $ 4 R F V % 5 T G < C B Y H & 7 U N * 00 8 1 i J D M K 9 O H I O 18 L P V I1. How many milliliters of concentrated hydrochloric acid, 38% (wt/wt), specific gravity 1.19, are requiredto prepare 1 L of a 0.100 M solution? Assume density and specific gravity are equal within threesignificant figures. (H-1.008 amu, Cl-35.45 amu) 2. A 0.456-g sample of an ore is analyzed for chromium and found to contain 0.560 mg Cr2O3.Express the concentration of Cr2O3 in the sample as %w/w.
- FO < STARTING AMOUNT Type here to search 1 N W X JL S F3 X 3 32 11 C What quantity of moles of glucose (C6H12O6) in 0.500 solution? ADD FACTOR 0.500 O 1.20 x 10²⁹ 100 F5 0.400 R mol glucose C % 5 0.020 F6 36.03 T 意回 FR g glucose Time's Up! 6.022 x 10²3 1 B 99+ 11 mL DELL H D 225 7 ANSWER 3 N 180.18 7.53 x 10²3 L of a 0.400 M L 1.25 M glucose F10 M RESET 2.08 x 10-24 K 5 0.200 F11 57°F Cloudy PriSer Curt la4:11 ul LTE 4 PrepSoln-Data 1 of 2 Data sheet Preparation of Solutions Part A: Weight by volume: Prepare a 3% solution with total volume as requested. Concentration of solution 3% Volume of solution 250 ml Mass of salt required Comments: Part B: Volume by volume: Prepare a 5% ethanol solution with a total volume of 250 ml. Concentration of solution 5% Volume of solution 250 ml Volume of ethanol Comments: Part C: Preparing a solution from solid by knowing the molarity: Salt used CuSO, - KCI – NH,CI CuSO.5H20- CaClz Molecular weight Concentration of solution 0.3 M5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. dilution factor for ALPHA from stock solution = 0.167 dilution factor for BETA from ALPHA solution = 0.0476 part c and d?
- ookmarks 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 < EmailName: Date: Section: Data Report Sheet: Analysis of an Unknown Chloride Unknown # -2 Molarity of Standard Ag(NO), 5.2167x10 M Trial I Trial II Trial III Mass of Unknown 0.237 o. 232 g g Initial Burette Reading 0.00 mL 7.90 mL mL Final Burette Reading 31.00 mL 42.00 mL mL Vol. Ag(NO3) Added 31.00 mL 34.10 mL mL Moles Ag(NO,) 1.617177y10 mol. 1,7789 v10 mol. Moles CI 1.617177x103mdl. Mass Cl 0.05741 8 0g 24.22 % 27.22% Cl in Unknown Average % Cl in unknown 25.720%1a) 0.1% = ? ug/ml? Only include the number and not any units b) What is the concentration of your stock in ug/ml? Only include the number and not any units c`The molecular weight of tartrazine is 534.4 g/mole. What is the concentration of your stock solution in mM? Be sure to give your answer in milliMolar to TWO decimal places. d)What dilution of your stock do you need to get the first standard (100 ug/ml)? Express as 1:x, where x is the fold dilution needed.
- 5) If all the NaHCO3 in bag 2 reacted, calculate the number of moles of gas produced? tates) E FocusAn unknown sample containing a mixture of NaCl and Na2CO3 was analyzed to determine the % composition of each compound. In the analysis for Na2CO3 (soda ash), the following data were obtained mass of unknown - 0.4436 g conc. of HCl used - 0.25 N initial volume - 0.5 mL final volume - 20.0 mL (MW soda ash) 106.12) 1.) What method was used to determine the concentration of HCl? 2.) What is the net volume of HCl used in the titration? 3.) What is % Na2CO3 in the given sample? NOTE: Round off your answer to a whole number (2 sig fig)Please help me find weight percentage of the unknown solution, Thank you in advance Data attached below: Data of unknown NaCl solution (by weight) weight of weighing bottle and solution: 34.91g weight of weighing bottle: 23.91g weight of the solution: 11.00g Initial buret reading 33.28ml Final buret reading: 43.26ml The volume of the solution; 9.98 ml The density of solution: 1.10 Weight % of unknow solution: ?