Expert Answers

Description there is a video and all the instructions are on the worksheet. I would like the answers to be written on the worsheets. Thank you

Description What is the density of Radon (Rn) gas at STP ? What volume will 1.05 mol of NH3 occupy at STP? What is the molar volume of ammonia (g) at 270 K and 0.98 atm?

Description Use Hypochlorous acid as example to make your point. Write chemical equations to support your answer.

Description Click on the link below and complete the virtual lab for Cobalt Chloride and LeChatlier's Principle.  After completing the lab, you will generate a simple lab report following the outline in the attached document.  All data should be included in the report.  The lab must be accurate and correct. http://chemcollective.org/vlab/85

Description PLEASE NO PLAGIARISM Buffalo Case Study A Case of Rodent Speciation Background Asanexpertinthefield ofmammalianreproductivestrategies,youhavebeenhiredbytheDepartmentof NatureandIslandResourcesoftheWestIndies.This organizationisacooperativeofseveralWestIndies islands concerned with the loss of biological diversity on their island nations as tourism and development continue to grow. Scientists working on the island of St. Kitts and its sister island Nevis have uncovered what appears to be a previously undiscovered species of rodent. Basedontheoriginaldescriptionofthisanimal,itwasplacedinagenuswithinthesquirrelfamily.What you have been hired to do is to help save the population on St. Kitts, which is small and threatened by development.Thepopulationissosmallthatindividualsarehavingdifficultyfindingmatesand,inmany cases,thereproductiveseasonsarebeingdelayedbyuptooneyear. Whenyouarriveintheregionandbegin your observations, you notice that the Nevis population is very healthy and could be used as stock for the recovery operation that you plan on the island of St. Kitts. In your recovery plan, you bring animals from Nevis into the population on St. Kitts to bolster the population numbers, ensure the availability of mates, and increase the genetic diversity within the shrinking population. As a good scientist, you observe the reproductivebehaviorsofthisanimalinthefieldto ensurethesuccessofyourprogram.Withinavery shorttime,yourealizethatyourplanisfailing.In the240 attemptstobringaNevisanimalintotheSt. Kitts population, you are unable to observe a single successful reproductive event. Although these animals look identical, you are concerned that they are two distinctspecies. Yourfocusnowbecomesidentifying thedifferences betweenthetwopopulations.What follows is a brief review of the data you collected from your study. St. Kitts Rodent Nevis Rodent Average weight: 83g Average weight: 86g Average length: 21.8cm Average length: 23.3cm Average hind limb: 7.8cm Average hind limb: 4.2cm Average forelimb: 4.2cm Average forelimb: 3.9cm Top speed: 2.2meters/second (m/s) Top speed: 0.8m/s Average leap height: 1.4m Average leap height: 0.4m Average gestation time: 29.3days Average gestation time: 42.7days Average time spent in courtship display: 12.6seconds Average time spent in courtship display: 21.3seconds Assignment Thiscase study describes a recovery program for a rodent population on the island of St. Kitts in the Caribbean. After reading the case study above, your job is to formulate your own story incorporating some of the details and data provided while also drawing on several evolutionary concepts studied in class. A list of these concepts can be found at the end of this document. Thereare no limitations on the details you can incorporate into your story, but it should follow some specific guidelines.Your story: 1.  Should be 600words or less. 2.  Should incorporate the data supplied in the case study. 3.  Should incorporate at least three of the concepts from the “Concept List.” As you incorporate each concept, you must demonstrate its relevance to your story. 4.  Can be told in any form. For instance, one student presented the story as fieldnotes collected from observing the animals in their natural habitat. Another student presented the story as a series of experiments and observations made by groups of scientists over hundreds of years. Be creative. 5.  Should account for the data on the organisms provided in the case study. It is acceptable to add more data as you develop your story as long as it fitsinto the patterns of the data provided. 6.  Can include graphics and illustrations. Be sure to cite the source and give credit for the material, including material taken from the Internet. Avoid plagiarism. 7.  Should include a scientificand common name* (see Note below) for the rodent populations. In developing these names, make sure you use the rules for binomial classification.In addition, make sure that you put the rodents into an existing genus.You come up with the species names. 8.  Needs a good title. 9.  Proof read. Check for spelling errors. Make sure your sentences are grammatically correct and that they are complete sentences. Remember that you are developing an evolutionary picture of a rodent population using data supplied with the case study. Keep in mind that in an evolutionary story you will be describing events that may have occurred over very long time periods. Important:When incorporating concepts from the “Concept List” into your story, you must elaborate on how they relate to your story. Simply including a concept word in your assignment is not acceptable. For example, stating that “the animals became two species because of genetic drift” is not sufficient.You must also explain how genetic drift works in this process. Concept List You must include at least three of the following: • Genetic drift • Bottleneck effect • Founder effect • Gene flow • Mutation • Natural selection—Directional selection • Natural selection—Stabilizing selection • Natural selection—Diversifying selection • Prezygotic reproductive isolation—Ecological isolation • Prezygotic reproductive isolation—Behavioral isolation • Prezygotic reproductive isolation—Temporal isolation • Prezygotic reproductive isolation—Mechanical isolation • Prezygotic reproductive isolation—Gametic isolation • Postzygotic reproductive isolation—Hybrid inviability or fertility • Allopatric speciation *Make sure you explain these concepts in your paper. Also, make sure you are using them properly and they make logical sense with your story. *Note: Scientific Names:  Development of Classification  Hierarchy of taxa is one major concept Linnaeus introduced. a.  Hierarchy contains eight major ranks: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species b.  All animals are classified in kingdom Animalia, each species has its own name; the names of animal   groups at each rank in the hierarchy are called taxa (singular: taxon). c. Each rank can be subdivided into additional levels of taxa: suprafamily, subclass, infraclass, etc. Linnaeus introduced binomial nomenclature. a. Scientific name consists of two words (binomial) as in (Ursus americanus) b. First = Genus and is capitalized; the second = species epithet and is in lower case. c. Scientific name is always in italics or underlined if handwritten. d. The specific epithet is never used alone; the genus must be used to form the scientific name as Ursus    americanus . e. Ranks above species are single names written with a capital initial letter (e.g., Reptilia and Cnidaria),   but not italicized or underlined. Do not plagiarize in any shape or form. Your paper will be submitted to Turnitin.com to check for plagiarism. All instances of academic dishonesty will be reported to the Office of Community Standards. Judicial procedures are described in the Student Resource Handbook (Procedures for Adjudicating Alleged Academic Conduct Infractions, beginning on page 16). Credit: Photo of St. Kitts coastline © Jason Ross | Dreamstime.com.

Description i need someone to answer these questions

Description There is no textbook required for this lab, however there is stimulation that needs to be completed which is given in the file I uploaded (should be on the 3rd page). There is no specific way I need this written out as long as it is completed visibly.

Description i need it in 4 hours pls. the info in a file below

Description This is the last one. In this Unit, we learned about different kinds of chemical reactions. You will demonstrate your understanding of these concepts by performing an experiment that focuses on chemical reactions between different substances. Before you begin, review the concepts behind chemical reactions found in your textbook. You will be using these concepts to carry out your experiment. First, formulate your hypothesis (Scientists pride themselves on being able to prove themselves wrong. So don’t worry if your hypothesis turns out to be incorrect!) What do you think the reactions will be between the different kinds of candies when they are placed into the different kinds of soda? Record your predictions. Remember to record a hypothesis for each separate type of candy, combined with each different type of soda. Next, collect all the necessary items for the lab. You may already have these things around your home, or you should be able to get them easily at any store. You will need: Mentos candies Another type of candy Meter stick Magnifier Test tube Then, carry out the experiment. Make sure you are wearing your safety equipment, and that you are carrying out the experiment in a box or aquarium that will prevent a mess. Place each different type of candy into each different kind of soda and record the reaction that takes place. Be careful, because this may or may not cause a violent chemical reaction that could result in an overflow of soda. Finally, you are going to compare the predictions you made in your hypothesis to the results you got when you conducted your experiment. Did the experiment go like you planned? If not, why do you think the results were different from your predictions? Why do you think the experiment turned out the way it did? Were there any additional factors that might have influenced the results of the experiment? If you did the experiment again is there anything you would have done differently? You will complete a lab report to turn in to report your findings. If you need a review on how to prepare a lab report, return to your Unit 1 Project for guidance. Final Product: Lab report Your lab report will be made up of four sections. Each section will be between two and five paragraphs. These should be labelled with individual headers: Question and Hypothesis, Experimental Process, Summary, and Analysis. You will be graded on each section individually. You will be assessed on understanding of the scientific process, the content of your experiment, and the thoughtful development of your ideas. Notice that the Analysis section is weighted heavier than the others - the Analysis section should discuss what your your results mean, and this is the most important part of your experiment. 15% of your grade will be on grammar, mechanics, and polish. This will include spelling, punctuation, sentence structure, clarity of writing, and organization for ease of reading. An introduction describing your question and initial hypothesis (20%) A description of your experimental process (20%) A summary of your results (20%) An analysis of your results (25%) You may use online resources to help you create a question or understand your results. This is completely acceptable, as long as you appropriately cite your sources. This paper must be written in APA style, in at least 500 words with strong descriptive details. Refer to the following website for additional help: https://owl.english.purdue.edu/owl/resource/560/01/ Project Rubrics Project Rubrics "Make sure to show your work and use the correct amount of significant figures. "

Description Assignment: Properties i will send  the images separately  For each of the objects list six physical properties of the object. Identify each property as extensive (E) or intensive (I) and describe how you know it is an intensive or extensive physical property. Then, select one property you identified for each object and describe, in detail, how you would test that property. For example, if you determined that a metal rod is very dense, how would you measure its density? Record your answers in the template provided and submit them to the Assignment: Properties link for grading. For more information on how this will be graded, please view the grading rubric. Section Warm-Up Journal: Seltzer in Water [img alt="A seltzer tablet in water." src="http://static.k12.com/eli/bb/334/2_23579/1_124930_4_23583/634a35ff424938d285f15dd8d832abf31af3e831/media/33db7dd8daaa6dc72d1d5e4ca5bce6198a5e020e/mediaasset_630661_1.jpg" title="A seltzer tablet in water."> In your house, grab a small cup of water, some seltzer tablets, and a thermometer. Over-the-counter heartburn or cold remedies will work for the seltzer tablets—just look for the ingredients, sodium bicarbonate and citric acid. Before doing anything, write down some physical characteristics of each substance (the water and the tablet). Then, take the temperature of the water. Now, add the seltzer tablets to the water, leaving the thermometer in the water. Answer the following questions in your journal: What happens? What does the final product look like? Is it still water? How do you know? Did a physical change take place? How do you know?  Was there a temperature change during the event? Write down your observations and answers to these questions in your journal and submit to the Journal: Seltzer in Water assignment link for grading. For more information on how this assignment will be graded, please view thejournal rubric. Lab Introduction Paper is an amazing material. Most paper is made from the cellulose fiber obtained from trees or other woody plants. Unlike wood, you can fold paper, tear it, or dissolve it in water. Each of these changes made to the paper is classified as a physical change.Paper, like the wood it is made from, can also burn in the presence of oxygen and enough heat– this is considered a chemical change. In this laboratory experiment, you will observe the physical and chemical changes that a substance can undergo . Lab Instructions Time Requirements: approximately one hour Procedures: Follow the lab instructions to perform the laboratory investigations. As you perform your experiment, record everything in this lab instruction sheet. Use the checklist to make sure all parts of the lab are complete. Read through the lab introduction. Complete the pre-lab questions. Read through the lab instructions completely before setting up the materials for your experiment. Conduct the experiment. Complete the calculations (if any) and answer the post-lab questions Lab Objectives After you have completed this laboratory, you will be able to: Recognize the differences between chemical and physical changes. Determine if a change is physical or chemical. Lab: Chemical and Physical Changes Congratulations on completing this lab! In this lab, you learned about: Laboratory procedures to separate and combine chemicals The physical and chemical properties of a substance Now it is time to turn in your lab instruction sheet. Make sure you have filled in all the relevant information and answered all the post-lab questions. Submit your lab report to the Lab: Chemical and Physical Changes assignment link for grading. For more information on how this assignment will be graded, view the Lab Rubric. Exploratory Activity: Chromatography Materials:Forensic scientists use chromatography on ink pens to tell if a document was written with a specific pen. This can provide direct evidence in many types of cases. For example, if a ransom note was found, forensic scientists would analyze the ink using chromatography.If a suspect was found with a pen that showed the same chromatography pattern, the forensic scientists would have strong evidence to suggest that suspect wrote the ransom note. Let’s see how forensic scientists would test a pen. You will need only a few simple household materials. Two coffee filters Two different black markers (NOT permanent markers) Saucer Water Activity Worksheet Procedure: Using one of the black markers, place a dot in the center of the filter paper. Place the filter paper on the saucer. Put a few small drops of water on the spot. Wait a few minutes…what did you see? Now, using the other black marker and the other coffee filter, repeat the procedure. What did you see this time? Many black inks are made up of several dyes. Explain any differences you saw between the two markers. Did the components of the inks separate differently? Are any of the component colors the same in both of your markers? Answer these questions in the exploratory activity worksheet and submit your worksheet to the Exploratory Activity:Chromatography assignment link for grading. For more information on how this assignment will be graded, please view the rubric. Lab Introduction You’ve just poured yourself the last bowlful of your favorite breakfast cereal – Up & Atom. While working your way through the first few spoonfuls, you discover, from the information on the box, that each bowl contains your complete daily allowance of iron. Is there some way you can prove the cereal manufacturers statement? You’ve already added milk to the cereal. How would you separate out this mixture to measure the iron content? This lab will walk you through some of the processes for separating mixtures. Lab Objectives After you have completed this laboratory, you will be able to: Use physical properties to separate the components of a mixture. Use laboratory techniques to separate the components of a mixture. Lab Instructions Time Requirements: approximately 1.5 hour Procedures: Follow the lab instructions to perform the laboratory investigations. As you perform your experiment, record everything in this lab instruction sheet. Use the checklist to make sure all parts of the lab are complete. Read through the lab introduction. Complete the pre-lab questions. Read through the lab instructions completely before setting up the materials for your experiment. Conduct the experiment. Complete the calculations (if any) and answer the post-lab questions