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Chemistry

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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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Water and rubbing alcohol have distinct properties and will react differently with the same substance. Observe these properties of water and rubbing alcohol: color, smell, and ability to dissolve salt. Record your observations in the table. To observe the solubility of salt in the liquid, put one-quarter teaspoon of salt into each container and stir. You may weigh out 1.5 g of salt on the electronic balance if you don’t have a one-quarter teaspoon measure. Observe the properties of the liquid in the container labeled unknown. Record the properties of the unknown substance in the table. Now observe the properties of the liquid in the container labeled unknown. Record the properties of the unknown substance in the table. Unknown Substance color smell solubility of salt Based on the observations, which liquid is the unknown liquid?
Translate to a system of equations and solve. A scientist needs 150 milliliters of a 20% acid solution for an experiment. The lab has available a 25% and a 10% solution. How many milliliters of the 25% solution and how many milliliters of the 10% solution should the scientist mix to make the 20% solution? 25% solution 10% solution
I’m stuck in this those question To make 1L of 250mM NaCl, I would add ——-grams of NaCl to a graduated cylinder and bring the volume to ——-mL. To make 50mL of 2% NaCl, I would add ANSWER grams of NaCl to a graduated cylinder and bring the volume to ANSWER mL. To make 200mL of 1x solution from a 10x stock, I would add ANSWER mL of 10x stock to a graduated cylinder and bring the volume to ANSWER mL.
pH = 2.02 Express your answer using two significant figures. [OH-] = Submit VO ΑΣΦ t e Previous Answers Request Answer D ? M
For questions #14-16, you should do your work on a separate piece of paper and then upload it. You should use the GUESS Method of solving for each problem. Also, you have a choice. You can complete both #14 & #15 which are single step question or do the extension problem which is a 2 step problem instead of 14 & 15. You must complete #16. Equations Q = mcAT Q = ±mLf Q = ±mLv Values for Water Clice) = 2.06 J/g°C C(water) = 4.186 J/g°C C(steam) = 1.87 J/g°C Lf (water) = 333 J/g Lv (water) = 2,260 J/g %3D G- S- U- E- S- #14. Calculate the energy required to heat 12.5 g of water from a temperature of 42.2°C to 52.3°C. #15. How much thermal energy is needed in order to turn 15.7 grams of water into ice? Extension: We start with 23.2 grams of ice at 0°C and add heat to the ice. The ice completely melts and then is heated until it reaches 45.3°C. How much energy is added in total? #16. 12.0 g of a metal absorbs 317 J when it is heated from 38.2°C to 82.7°C. What is the specific heat of the…
1211 120 110- 100- 9어 1986,46cm-1, 92.30%T 1888.12cm-1, 86.12%T 523.69çof-1. 89.49%T 2115.07cm-1, 87,12%T 80- 2868.59cm-1, 81.50%T 2324.95cm-1, 80.38%T 3056.42cm-1, 78.57%T 550.70cm-1. 78.65%T 1702.35cm-1, 76.07%f 1927.16cm-1. 77.87%T 70- 564.67m-1, 79.00%T 1075 B3cm-1, 73.25%T 1998.63cm-1, 70.10%T 615,31cm-1. 70.28%T 596.43cm-1, 73.02%T 1175.49bm-1 68.00%T 1220.95cm-1, 70.17%T 1321.38cm-1, 65.41% 813.05cm-1 67.15%T 864.57cm-1, 70 74%T 1150.80cm-1, 71.53%T 764.65cm-1, 61.64%T 944.04cm-1|60.89%f 935.39cm-1, 61.19%T 918.05cm-1, 57.40%T 1160.53cm-1, 71.59%T 785.46cm-1, 79.57% 60- 1575.58cm-1, 58.026T 1447.52cm-1, 57.15%T 504.91cm-1, 67.34%T 1593.50cm-1, 54.46%T spom-1. 50- 702.64cm-1. 50d.16%T 692.96cm-1, 4.59%T 1650.46cm-1, 50.27%T 1274.05cm-1, 46.51%T 40- 636.49cm-1, 49.33%T 30- 20- 508.62cm1, 24.70%T 514.69cm-1. 26.58%T 10 94 4000 3500 3000 2500 2000 1500 1000 500 cm-1 Name Description Sample 2a 1 067 By Analyst Date Tuesday, July 07 2020 for
How much water must be evaporated from a 60 oz, 5% saline solution to produce a 25% saline solution? Round your final answer to 1 decimal place if necessary. oz
< STARTING AMOUNT X A brine solution is 3.50% NaCl by mass. Given that its density is 1.071 g/mL , determine the quantity of liters of solution that contains 5.00 moles of NaCl 5.00 ADD FACTOR 0.1 *( ) 3.50 10 35.45 Question 29 of 33 1.071 0.01 8.03 x 1022 1000 100 ANSWER 7.80 22.99 0.0156 L solution g NaCl/mL g solution mL solution kg solution g NaCl/g solution 58.44 6.022 x 1023 0.0780 moles of NaCl mol NaCl RESET 0.001 2 1 g NaCl 1.56
I need help calculating the moles of acid and basebised and also the molarity of the base solution oles RECORD ALL DATA IN INK using the correct number of significant figures and correct units. SHOW COMPLETE "SET-UPS" (and the rounding off) for all calculations for Part 3 on the bottom of this page or on a separate sheet. 3. Standardization of the NaOH Solution: Titration No. Acid buret, Final reading Initial reading Volume of acid used Moles of acid used Base buret, Final reading Initial reading Volume of base used Moles of base used Molarity of base solution Set-ups: 1 2 3 24ml 36. 24ml 12- 12 m 12ml Average Molarity of the NaOH solution Average Deviation 13 25.5 13 13 12.5ml 12 mil. 31.5 4 5 6
During Lab 4, you are titrating a sample of new orange juice to determine its ascorbic acid (aka vitamin C) content. You have previously determined an experimental conversion factor of 0.26 mg ascorbic acid/mL dye using an ascorbic acid standard. After measuring out 5.16 mL of your orange juice sample and ~10 mL of 3% metaphosphoric acid to a graduated cylinder, you dilute the solution to 50.33 mL with DI water. You finally dispense 10.87 mL of the diluted solution into an Erlenmeyer flask, add 4 drops of HCl, and use 6.48 mL of dye to reach the equilibration point. How much ascorbic acid (mg) is in your concentrated orange juice sample? The molecular weight of ascorbic acid is 176.12 g/mol.
Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles? A- Add water to the mixture B- Use tweezers to separate them. C- Pour the mixture into a filter. Use a magnet to separate them.
A student prepares a 1.1 mM aqueous solution of 4-chlorobutanoic acid (C3H, CICO,H). Calculate the fraction of 4-chlorobutanoic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. % X S