FAlpOLSdkkcb8p7Lki9hSE-PEqyqO02a33Gom9YvugXu6b5uYkOPEUw/formResponse plify ern. Karely 1. Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed the results and found two ending substances. One of the ending substances was a white solid. This ending substance is made up of the repeating group of atoms shown below. Which of the diagrams to the right shows the repeating groups of atoms that make up the samples Serena mixed together? Y Sample 1 Sample 2 An ending substance Sample 1 Sample 2 Properties: Bay solid mells like flowers Properties: gray solid smells like bleach Properties: white solid smels sour Sample 1 Sample 2 Sample 1 Sample Sample D A. Diagram A B. Diagram B C. Diagram C

FAlpOLSdkkcb8p7Lki9hSE-PEqyqO02a33Gom9YvugXu6b5uYkOPEUw/formResponse plify ern. Karely 1. Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed the results and found two ending substances. One of the ending substances was a white solid. This ending substance is made up of the repeating group of atoms shown below. Which of the diagrams to the right shows the repeating groups of atoms that make up the samples Serena mixed together? Y Sample 1 Sample 2 An ending substance Sample 1 Sample 2 Properties: Bay solid mells like flowers Properties: gray solid smells like bleach Properties: white solid smels sour Sample 1 Sample 2 Sample 1 Sample Sample D A. Diagram A B. Diagram B C. Diagram C

Chemistry for Engineering Students

3rd Edition

ISBN:9781285199023

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter1: Introduction To Chemistry

Section: Chapter Questions

Problem 1.77PAE

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4m K R EMetals H X Se.com/u/1/c/MTUAMTYZNTK2OTM3/a/Mig0NjcAMzk0ODA4/delails tals Homework Packet 18.pdf Oper wth UNDERSTANDING ORES Most ores look like ordinary rocks. You would not guess that they contain shiny metal. The earth's crust is made up of many minerals. Minerals can be defined as naturally occuring chemical elements and compounds. People have discovered more than 2,000 different minerals. Many of these contain metals. But because the metal elements are linked with other elements in the minerals, the metals do not show all of their properties. Figure A 1. Most minerals are elements, compounds 2. In order to free the metal from the other elements, a mineral must be synthesized, decomposed Page 3 I 6 Q +
A compound Y (150.0 g/mol) in a 1.00 cm quartz cell has an extinction coefficient (E) of 23,150 at Amax=235 nm. What is the energy absorbed by the compound at the maximum of the peak? Note that hc=1.98644586x10-25J*m. Report your answer in KJ/mole to the correct number of significant figures.
R 400m N CO₂tBu OH CO₂Me Ph LDA THF, -78 °C silica gel 6 days room temperature R MeO₂C NCO₂Bu CHO CO,Me I + H₂O
CHM 204 X Fichas de aprendiz x Course Home A Both Ti and Hf bet x ellumHMAC-0efcd4f4b9862c5b13e8f142f86b1f28#10001 Part D Write a balanced chemical equation for the complete oxidation of N₂ to form N2O5 (g). Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣΦ ? Achemical reaction does not occur for this question. Submit Request Answer Part E Write a balanced chemical equation for the complete oxidation of acetylene to form CO₂ (g) and H₂O(g). Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣΦ ? Achemical reaction does not occur for this question. Pearson arson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | ☐ hp ▼ X + > Review | Constants | Periodi
0.56 g 1,4‐dimethoxybenzene, 0.9 mL 2‐chloro‐2‐methylpropane, 5 mL nitrobenzene and 0.52 g graphite were combined, and the mixture was refluxed for 1.5 hours. It was then cooled to room temperature and filtered. The filtered graphite was washed with 15 mL hexane. The filtrate was distilled under vacuum to remove any remaining 1,4‐dimethoxybenzene, 2‐chloro‐2‐ methylpropane and nitrobenzene (6.3 g), yielding 0.44 g 1,4‐di‐tert‐butyl‐2,5‐dimethoxybenzene (43.4% yield). What is the Atom economy, E factor, and effective mass yield?
Significance of your results: Titanium is also commonly anodized, but does not need to be dyed to achieve colored surface layers. Instead, the color comes from thin-film refraction within the oxide layer - the color is characteristic of the thickness of the oxide layer. Ti²+ (aq) + 2e-Ti (s) E° = -1.60 V TiO₂ (s) + 4 H+ (aq) + 4 e-Ti (s) + H₂0 (1) E° = -1.076 V a. What is the half-reaction at the anode for the anodization of titanium? b. Under standard conditions, what is the smallest potential you would need to provide in order to anodize titanium?
Nanoparticles were synthesized in various solvents and were analyzed with XRD, its diffractograms shown below. Which among the solvent choices is one best suited to synthesize the tetragonal polymorph of this nanoparticle? • Tetragonal phase O Monoclinic phase Benzyl alcohol Isopropanol Anisole holder Dibenzyl ether Diisopropyl ether Benzaldehyde 20 60 20 40 80 100 O Benzyl alcohol Benzaldehyde Diisopropyl ether O Anisole O O Intensity (a.u.)
eirli ri boeu 2s9dut tesi ari neolb of onot 2u of ton insiioqmi ti ei vrlW 6. If an unknown forms a silver mirror in the Tollens test, forms a purple color in the Schiff test, produces no precipitate in the iodoform test, has a refractive index of 1.5250, and forms a semicarbazone melting at 124–126 °C, what is its identity? Support your conclusions. Satsoilqid ni elest evitstilsup orli miohsq of inshoqrai ti ai ydW .E ISBN O-87540-728 © 1999 by Chemical Education Resoure
...before addition of solvent - ▪ What are two methods of extraction A)liquid-liquid, Solid Phase Extraction B)solid-solid, Gas phase ▪ C)evaporation, derivatization
show solutions 1. 10.000 grams of Clay was analyze for Iron content. Its moisture content is 2.00%. The sample was digested with oxidizing acids to convert all Iron into Fe3+. An excess of NH4OH was added and yielded a gelatinous precipitate of Fe(OH)3. The sample was then ignited in a furnace and yielded 0.1212 grams of residue as Fe2O3. Calculate the percentage of Iron. 2. A 0.3000 gram sample contains only KCl and CaCl2. The sample was dissolved in water and yielded 0.5000 grams of AgCl upon addition of excess AgNO3 reagent. Calculate the percentage of KCl and MgCl2.
A compound Y (150.0 g/mol) in a 1.00 cm quartz cell has an extinction coefficient (ε) of 23,150 at λmax=235 nm. What is the energy absorbed by the compound at the maximum of the peak? Note that hc=1.98644586×10−25J*m. Report your answer in KJ/mole to the correct number of significant figures. Do not include the units in your answer.
22. To test a spectrophotometer's accuracy, a solution of 60.06 ppm K2Cr2O7 is prepared and analyzed. This solution has an expected absorbance of 0.641 at 350.0 nm. Several aliquots of the solution produce the following absorbance values. 0.640 0.638 0.640 0.639 0.640 0.639 0.638 is there any significant difference between the experimental mean and the expected value at a 99.9% confidence level? Yes because tcal>tcritical Yes because tcaltcritical No because tcal