Chem 115 Activity 9

[References] Use the References to access important values if needed for this question. Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice, complete the following table, where N is a number. log N 7.92 1.867 -1.402 Submit Answer Retry Entire Group 4 more group attempts remaining Previous Next Save and Exit

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

Dr. X claims that she has found a new remedy (carrot extract) to cure acne. She scores an interview with the science writer for a local newspaper, and gets a brief article written about her and her claims in that newspaper. The article does not contain any experimental evidence, but mentions that Dr. X accidentally splashed some carrot extract on her face and found that the acne was reduced a few days later. Student Y finds the article and cites it as a source for a paper he is writing for class, as evidence that acne has been cured. (a) Is this finding a fact, a theory, a hypothesis, or an observation? Explain why you think so. (b) Was it OK for Student Y to use the newspaper article as evidence for his paper? Explain why or why not.

Please answer questions 3 and 4 and show work please. Thank you

What safety rules did Andrew break?

1

Experiment 4: Preparation and Properties of Hydrogen and Oxygen Gases Toriana Mieer -Jones Name: Section: Lab Instructor: L/26 Date: Pre-Lab Exercise 4 1. In this experiment, simple chemical reactions are used to generate small quantities of hydrogen and oxygen gases. These methods would be too expensive and too complicated if large quantities of these gases were needed, however. Use your textbook, a chemical encyclopedia, or an online source to look up the major industrial methods of preparing very large quantities of these gases. Summarize your findings here. ono od te led bateono to n

This question has multiple parts. Work all the parts to get the most points. Use the References to access important values if needed for this question. 18 16 14 12 10 8 6 4. Choose the correct relationship for the plot shown above. O a direct proportion O an inverse proportion O linear with a positive slope and nonzero y-intercept O linear with a negative slope and nonzero y-intercept Submit Cengage Learning | Cengage Technical Support MacBook Air DII E5 F6 EZ FA F9 F10 F 2$ & * ) 4 5 6 7 8 * 00

text Roboto BIUA 12 1三 主 2. 4. Baking soda is an essential ingredient for most bread recipes. Without baking soda, describe how bread would be different. You may focus on taste, texture, bake time, color, size, or any other relevant characteristics in your response.

We were given an activity about observing 2 balloons. 1 balloon is in the basin with cold water and the other balloon is in the basin with hot water we were task to observe it after 1 minute and after 3 minutes and wrote our observation which is the balloon in the basin with hot water expanded and the balloon in the basin with cold water shrunk. The question is how would we apply our learning on this activity in real life?

26) The floor tiles in SE 27 are about 1 square foot and the lab is about 25 tiles wide and about 36 tiles from front to back. When the emergency shower was demonstrated, in 10. seconds the water in the trash can was about 1 foot deep. One student estimated this was 2.5 gallons. Estimate how deep the room will get in inches after a 15 minute shower. List 3 simplifving assumptions you make in this calculation rea L-36 Tile fiDw ill it cost2 The density of gold is 27l An artist plans to apply gold leaf to a painting with an area of 2.32 f? and a thickness of 1.50

A sample initially weighs 48 g. How much would remain after 3 half-lives?

(a) The population of a large city grows very quickly for several years. Then the growth begins to slow, and the population remains constant for several years. After this, the population grows again, but slower than before. Population Population Population Population Time Time Time Time

There is one incorrect answer here. Can you help me figure out which one?

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

Please short answer

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View History Bookmarks Tools Window Help Firefox File Edit Module 11 HW Chapter X w NWP Assessment PlayeX Module 10 HW Chapter my.CSMD edu Module 9 HW ChapterX WNWP Assessment Play X O 8 https://education.wiley.com/was/ui/v2/assessment-player/index.html?launchld=9010073f-2141-4e90-8e6b-01c4c1518d8f#/question/5 + Module 11 HW Chapter 20 - Selected Exercises -/1 E Questio Question 6 of 8 Propose a plausible mechanism for the following transformation. Question Molecular Dra For the mechanism, draw the curved arrows as needed. Include lone pairs and charges in your answer. Do not draw out any hydrogen explicitly in your products. Do not use abbreviations such as Me or Ph Question 2 Molecular Draw -OH Question 3 Molecular Draw Pyridine Question 4 Multipart Step 1 Question 5 Multiple Choice Draw Step 1 of the mechanism. Viewing Ques Multistep HO Question 7 Multistep / Edit Drawing Question 8 Molecular Drawing MacBook Air esc ** F2 F3 F4 23 $ & * 3 8 Q W E R T Y lab S G caps lock C V hift alt…

M Apple Google Disney ESPN Yahoo! Biomedical Careers Program ☆ CATEG WHOS r B r SLIVET H₂ (9) + F2(g) → 2HF(g) PC15 (9) → PC13 (9) + Cl₂ (9) CO₂(g) + H₂(g) → CO(g) + H₂O(g) Apple iCloud Yahoo Images Bing Google Wikipedia Facebook Twitter D2L b G 3 2H₂O2 (1) → 2H₂O(1) + O2(g) prod03-cnow-owl.cengagenow.com 2CO2(g) + 5H2(g) → C2H2 (9) + 4H₂O(g) D2L VULLI CETURT JU D2L LITUNTUT T Clear All AS > 0 AS < 0 COWLv2 |... b too close to decide SISS LinkedIn The Weather Channel Yelp TripAdvisor C M G с G C VVIML. + 88 M

Safety is the     responsibility of the TA only.     primary responsibility of everyone in the lab.     last thing to think about when doing lab experiments.     least important thing, basically just trivia for extra credit.     first topic to read about after you do an experiment.

CD Page view O₂N A Read aloud 1015MSC Chemistry of Biological Systems II 2020 OH TAdd text Dra

口 A docs.google.com Classroom | Google for Education Alchemy Lesson 20 & 21 Worksheet Andres Carrill Andres Carrillo - Alchemy Lessons 20 & 21 Worksheet Update Apple ID S Some account servi available until you sig File Edit View Insert Format Tools Add-ons Help Last edit was 2 days ago 100% Normal text Arial 11 BIUA E = E = EE E - E E X 1 2 3 4 .. 6 I 7 O 8 1 IC 5 AIV-20: Getting Connected (Writing lonic Compounds) Part 1: Putting together lonic Compounds lonic compound Metal Number of cation nonmetal number of anion total total charge = 0 valence valence number of electrons electrons valence electrons NaF, sodium fluoride Na Na + (+1)+(-1) = 0 F- 8. MgO, magnesium oxide Mg 02- (+2) + (-2) = 0 MgCl2, magnesium chloride Mg CI 7 16 (+2) + 2(-1) = 0 Ne, neon Ne 8 BeF2, beryllium fluoride Be MgS, magnesium sulfide CaCl,, calcium chloride Na Br K Se Al Al203, aluminum oxide Al Al F

Sign in to edit and save changes to this file. 1. 121 49ln→ 121 + "5oSn 2. 8Be → 2_ 3. 1°4BE → °1B + 4. 8437Rb → °+1e + 128 128 5. 55CS→ 54Xe 6. 131m "s6Ba → oy + 7. 23793Np →42HE + ...

View History Bookmarks People Tab Window Help S, Amaya K - Outlo x B Chapter 5- CHEM-1110-941- x Question 20 - Chapter 5- Con x education.com/ext/map/index.html?_con%3con&external_browser%3D0&launchUrl=https%253A%252F%252Flms Saved 3 attempts left Check my work Enter your answer in the provided box. It takes 155 s for an unknown gas to effuse through a porous wall and 97 s for the same volume of N2 gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas? g/mol ... 115 MAR 1664 18 ottv A

Answer the following if True or False. (11-20)   11. UHF radiowaves are ionizing form of radiation. *   True   False   12. Gray is the unit of the absorbed dose of radiation. *   True False   13. Spent fuel, uranium dioxide, from nuclear power plant can be disposed as ordinary solid waste. *   True   False   14. Sievert is a unit of the amount of energy that has been absorbed by the living tissue. *   True   False   15. The earth is constantly bombarded by background radiation like cosmic rays. *       True   False   16. Half-life of radioactive nuclides decreases by half every time they emit radiation. *   True False   17. Alpha particles are the most ionizing radiations. *       True   False   18. Irradiated…

so that means route a is preferrable in a small lab and route b is preferred in a chemical plant?