2. Calculate the heat of solution per mole (kJ/mol) of the sample. I. Heat of Solution.1. Complete the table below.a) Mass of calorimeter5.0 gb) Mass of calorimeter plus water34.1 gc) Mass of ammonium chloride1.6 gd) Initial temperature30.0 °Ce) Final temperature26.5 °C29.1f) Mass of water, mH,0 (g)g) qH,0 for the reaction (J)416Th) AHsoln (J)

Given : Delta H solution =426 J Mass of ammonium chloride = 1.6 g

Answered: 2. Calculate the heat of solution per…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Dom Add Page 0.51, what is the concentration of the unknown (in mg/mL)? Show your work for full credit. 3. (1 point) Show the answer to the following question in correct significant figures. 10.219 +3.12 = 4. (7 pts) True or False. Circle the correct answer. True or False. A blank used to zero of spectrophotometer always contains just distilled water. True or False. The mode is the most commonly occurring number in a data set. True or False. One milliliter (mL) equals 1,000,000 microliters (µL). True or False. Peroxidase activity increases when the enzyme is boiled. True or False. Enzymes are carbohydrates. True or False. Denaturing involves an enzyme breaking down into individual amino acids. True or False. Hydroxlyamine is a competitive inhibitor of peroxidase. noint) How mony uL (miorolitora) orain 222 12 Show vour work for full oredit MAR étv
6. What volume of a 9% NaCl solution is needed to prepare 100 mL of a 0.9% NaCl solution?
4. A 1.0005 g sample contains selenite was determined using Fajan's method by performing a titration against standard 0.023 M silver nitrate solution, consuming 9.4 ml from burette to reach the end point. Write the balanced chemical equation between (FM: 169.87) AGNO; and (FM: 172.948) Na,SeO; to calculate % selenite (FM 126.968) SeO;² in the sample. * 0.343 % O 0.686 % 1.029 % 1.372 %
3. What is the primary standard for iodine solutions? 4.
4. A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Describe the step by step procedure on how to prepare 450.0 mL of a physiological saline solution.
30. What is the percentage strength (v/v) if 225 g of a liquid having a specific gravity of 0.8 is added to enough water to make 1.5 liters of the solution? 30. 18.75% v/v
5. You are testing for unknown compounds. Evaluate the results of these tests to determine the likely contents of each unknown solution. Compound Unknown #1 Unknown #2 Unknown #3 Unknown #4 lodine Yellow Dark blue Dark blue Yellow Benedict's test Green Blue Red Orange Sudan stain No interaction Top 1/3 of the solution turns red No interaction Top of the solution turns red Conclusion: what molecules are present in this sample?
Lab 2 Worksheet (cont.) Practice with Solution Calculations How many grams are needed to make each of the following stock solutions (use formula weights on chemical bottles)? 1. a. b. C. d. 100 mL of 0.5 M NaCl (sodium chloride) Mass 0.SX 0₁1 XS = N mass/Molar N = 2.99 nad 100 mL of 0.75 M Na2CO3 (sodium carbonate) 400 mL of 3 M CaCl2 (calcium chloride, anhydrous) 220 mL of 2 M NaHCO3 (sodium biocarbonate) 400 mL of 30% NaNO3 (sodium nitrate) Mos Volume in 'L' +0.5m/519 400 54 1000
4. What is the expected value for the heat of sublimation of acetic acid if its heat of fusion is 10.8 kJ/mol and its heat of vaporization is 24.3 kJ/mol?
1) If you need to set an experiment at 0 degree C, what will be the physical state of the water in the water bath?
4. How could you determine the volume a marble using water displacement? (Hint: The figure below shows the water displacement method being used to measure the volume of a solid object whose shape is highly irregular)
1. Determine the serial dilution used from the original water sample (100 mL) with 4.8 x 105 CFU asshown in the diagram.

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