A www-awn.aleks.com odic table -.. O Favorites - YouT... TV fuboTV - Watch... ALEKS - Caliyah... G kno3 acid or ba... G linear program.. G write formulas f. O CHEMICAL REACTIONS Cali Using molarity to find solute moles and solution volume A chemist adds 485.0 mL of a 0.744 mol/L sodium thiosulfate (Na,S,0,) solution to a reaction flask. Calculate the millimoles of sodium thiosulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits. mmol

A www-awn.aleks.com odic table -.. O Favorites - YouT... TV fuboTV - Watch... ALEKS - Caliyah... G kno3 acid or ba... G linear program.. G write formulas f. O CHEMICAL REACTIONS Cali Using molarity to find solute moles and solution volume A chemist adds 485.0 mL of a 0.744 mol/L sodium thiosulfate (Na,S,0,) solution to a reaction flask. Calculate the millimoles of sodium thiosulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits. mmol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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tea Name: coMparing Molarity of SWcct Tca OBJCCTIVC: In this activity students will be doing calculations to determine what the ideal Molarity for sweet tea is. Matcrials: You had pey me at. Sugar Tea Water Digital Balance Cups Prc Lab QUestionS: In your own words, what does Molarity mean? Molarity velume of galetim i8 the amountiuof gubstane in a certain What information do you need to calculate Molarity? Lhe uolume Op the Aolihion express ed you divide the moleg in litres Of solule aft do aunjon a How many grams of sugar are in one mole of sugar? Hint: The chemical formula for table sugar (sucrose) is C11H2205. 20x0.1:0.2 22112る:H 0.2moles1234- bb.8 Inde Data トS こ0 First, complete the conversions to fill in the first three columns of the chart below. Show your work on a separate pag Volumc RC9uired MOICS Of suar Grams of sugar concentration Tastc 2.0M 100.0 mL 1.0 M 70.0 mL 2.0 M 60.0 mL 4.0M 50.0 mL Create your solutions and then record compare the taste of each solution.
If you 3.7 grams of BeCl2 and 20 ml of a 3M solution of LiH and you make 0.22 grams of BeH₂ and .99 grams of LiCl. e. What is your theoretical yield of BeH₂ in grams? f. What is your theoretical yield of LiCl in moles? g. What is your theoretical yield of LiCl in grams? h. What are your percent yields?
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3. Caffeine, C3H10N4O2, is a Central Nervous System (CNS) simulate found in coffee, tea and other popular beverages. Analysis of an 8 ox cup of coffee determines the coffee contains 180 mg of caffeine. а. . What is the molarity of the caffeine in the cup of coffee? b. What is the % concentration of caffeine in the cup of coffee. c.. What is the concentration of caffeine in coffee in ppm?
B. 55.3605% C. 60.7023% D. 61.9649% 33. In standardizing a solution of NaOH (40 g/mol) against 1.431 g of KHP (204.22 g/mol), the analyst uses 35.50 ML of the alkali and has to run back with 8.25 mL of acid (1 mL 10.75 mg NaOH). What is the molarity of the NaOH solution? A. 0.8520 M B. 0.6546 M C. 0.4572 M D. 0.2598 M 34. A sample of a pyrolusite weighs 0.5000 g. To this is added 0.6674 g of As203 and dilute acid. After solvent action has ceased, the excess three-valent arsenic is titrated with 45.00 mL of 0.1000 N KMNO4. Calculate the oxidizing power of the pyrolusite in tems of percentage MnO2. A. 78.1506% B. 55.8107% C. 39.0006% D. 19.5003% 35. A solution of iodine is such concentration that 20.00 mL are required to titrate the antimony in a 0.100 g sample containing 84.93% Sb2S3 (339.7 g/mol). What is the value of 1.00 mL of this iodine in terms of grams of sulfur in titration? A. 0.0248 N B. 0.0496 N C. 0.0744 N D. 0.1489 N 3.
A solution of ethanol (d = 0.795 g/mL) and water (H,O) is prepared by placing 30.0 mL of ethanol in a 250.0 mL volumetric flas. and diluting with water to che flask etched mark. a. What is the molarity of the ethanol in this solution? b. Next, 25.0 mL of the solution above is diluted to a final volume of 500.0 mL What is the new molarity of the diluted solution?
101) X -p.101edu.co - Hiring Ce... F4 144 $ 4 Aktiv Chemistry F5 PU 25 F6 A k How many moles of sodium chloride are there in 0.55 L of a 1.60 M aqueous solution of sodium chloride? A 6 X A) 2.90 Login - Labster B) 0.344 C) 0.880 F7 D) 4.20 F8 7 X Question 9 of 9 F9 88 11. Erikson's Psychosocial Theory o X DELL F10 9 F11 8 O F12 + PrtScr T DE Insert Dele Back
Show all pertinent solutions. Expree your final answers up to fourth decimal places. 1. In the preparation of aspirin, 6.0 grams of salicylic acid was made to react with acetic acid anhydride forming 4 grams of aspirin. Calculate the % yield of aspirin. 2. Calculate the amount of sodium sakt of aspirin obtained from the preparation
A 0.772 g Mixture containing only sodium chloride. and potassium chloride was dissolved in water. It required 32.9 mL of 0.366 M AgNO3 to completley percipitate all the chloride present. What is the percent composition by mass of sodium chloride. and potassium in the mixture?. Amass percent NaCl = #mass percent KC1 =
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Calculate the molarity of the solution when 804.0 mL of solution contains 0.0900 moles of HCI. In the three blanks, enter the value (decimal notation with proper s.f.), units, and substance (in this order).