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Answer: The reaction rate increases.
Explanation: rate increases because potential energy decreases.
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Environmental Sustainability Proposal For Sun City
The rapid expansion of Sun City in the past thirty years has exerted immense pressure on the environment. The city's expan ...
Environmental Sustainability Proposal For Sun City
The rapid expansion of Sun City in the past thirty years has exerted immense pressure on the environment. The city's expansion is characterized by ...
UCLA Microscopy Skill Check Worksheet
I have paper at word: My required is:-1. Pre-LabFill in the total magnification for each of the lens combinations. 2. Samp ...
UCLA Microscopy Skill Check Worksheet
I have paper at word: My required is:-1. Pre-LabFill in the total magnification for each of the lens combinations. 2. Sample Problems, Determination of Specimen Size (Do these on the Skill Check Worksheet)You will be asked to determine the size of a number of specimens in this course, so the next few problems for determination of size are for practice. Determine the size of each of the specimens in the following example problems.3. Question 1: When you look at the letter “e” under the microscope, is the letter oriented in the same direction as when you look at the slide? If it is oriented differently, why do you think that might be the case (see the optics diagram in the pre-lab to help you out)Question 2: How is what you see now different from what you saw under the 4X objective? Explain what that difference is?Question 3: How is this view different from what you saw at 10X? Write a short statement that describes what is happening in what you see as you change from the 10X to 40X objectives.Question 4: When you move the stage from left to right, which direction does the image of the letter “e” move? Why do you suspect this is the case?4. Colored Threads Slide:Question 5: Do all of the strands on the slide appear to be completely in focus at the same time at this magnification?Question 6: Why do the strands appear to be in focus at some magnifications and not others? (Hint: are the threads really flat, or is there depth to them?)Activity 2Question 7: In the space below, give a general description of the look of the epithelial cells. In the pictures below, label any structures can you see (nucleus, cytoplasm, cell membrane). Estimate the size of these cells using the procedure you learned in the pre-lab.
ENV 121 NVCC How Wolves Can Change Rivers Discussion
Purpose
The discussion provides you with an opportunity to review the threats to biodiversity and evaluate endangered spec ...
ENV 121 NVCC How Wolves Can Change Rivers Discussion
Purpose
The discussion provides you with an opportunity to review the threats to biodiversity and evaluate endangered species management. You will also discuss biodiversity and the species concept, and some of the ways we benefit from biodiversity.
Directions
Please follow the discussion guideline [PDF] (Links to an external site.) to post your initial response and participate in the discussion.
Read the case study on page 227, How Wolves Can Change Rivers, and/or watch the video: Wolves of Yellowstone/Earth a New Wild [Length 5:19] (Links to an external site.)--great example of the importance of biodiversity.
Answer the questions:
1) How did wolves help the economy in the Yellowstone National Park area?
2) What are other consequences of wolf introduction that were good for humans in the park?
3) Do you think there is something similar that could be done to help with deer overpopulation in Fairfax County?
4) What would you recommend? What would the issues/concerns be?
You may use the environmental science research guide to search for information.
Environmental Science Research Guide (Links to an external site.)
8 pages
Lab 2
Computer with Google Earth software loaded (see lab 1) and Adobe Acrobat Reader with TerraGo Toolbar (see pre-lab) OR your ...
Lab 2
Computer with Google Earth software loaded (see lab 1) and Adobe Acrobat Reader with TerraGo Toolbar (see pre-lab) OR your instructor can tell you how ...
CHE 122 GMC Concentration Temperature and solubility of Salts Lab Report
CHE-122: Principles of Chemistry IILaboratory 1 Procedure – Concentration, Temperature and the Solubility of SaltsBackgr ...
CHE 122 GMC Concentration Temperature and solubility of Salts Lab Report
CHE-122: Principles of Chemistry IILaboratory 1 Procedure – Concentration, Temperature and the Solubility of SaltsBackground:Solution is a homogeneous mixture of solute and solvent, solution = solute + solvent.
Figure 1. Ionic compound, NaCl salt (solute), dissolved in water (solvent) forming the solution.In this experiment we will analyze water solutions of ionic compounds, their concentration, and solubility in water.Concentration, in our case molar concentration, is the amount of solute, expressed in moles, that is divided by volume of the solution, expressed in liters. In the formula bellow, M is a molar concentration, n is a number of moles, and V is a volume of a solution.M = n/VEquation 1. Molar Concentration.Solubility provides information about amount of solute that can be completely dissolved in solvent at given temperature. It is expressed in grams of solute per 100 grams of solvent.
Figure 2 shows the typical representation of the solubility data, that is combined in the plot called temperature and solubility curve.
Figure 2: Temperature and Solubility Curve for Various Ionic Compounds in Water.This plot can tell us the mass of salt, expressed in grams, that can be dissolved in 100 grams of water at given temperature. There are three types of solutions that are described in this graph:Unsaturated solution: The solution that does not contain maximum amount of salt that can be dissolved in 100 g of water at given temperature (all the values below the graph line for analyzed salt).Saturated solution: The solution that contains maximum amount of salt that can be dissolved in 100g of water at given temperature (the values on the graph line for the analyzed salt).Supersaturated solution: The solution that contains excess of the dissolved salt than could be dissolved by the 100g of water under normal circumstances, temperature, and/or pressure (points above the curve for the analyzed salt).Temperature and solubility of ionic compounds: Temperature allows to dissolve more solute in 100 g of water, so we say that in most cases solubility of the ionic compounds increases with temperature.
There are several objectives of this lab:To enhance your ability to perform molar concentration to mass of the solute calculations.To familiarize you with the solubility curveTo improve your comprehension of the solubility.Pre-Lab Questions:Analyze Figure 2. Temperature and solubility curve for potassium nitrate, KNO3,And answer the following questions:What property is listed on x-axis?What property is listed on y-axis?2.Using graph for KNO3, in Figure 1, decide if the following solutions would be saturated or unsaturated?110g of sodium nitrate in 100g of water at 40°C?60g of sodium nitrate in 100g of water at 70°C?a. 140g of sodium nitrate in 200g of water at 60°C?3.According to the graph in Figure 1, will 50g of sodium nitrate completely dissolve in 100g of water at 50°C? Explain.Procedure:Collecting DataFrom the course home page, access the simulation environment by clicking on the Concentrationlink.1.After the simulation environment loads, set Volume for 0.1L by clicking on the bottom faucet. If necessary, you can add water by clicking on the top faucet.Select cobalt (II) nitrate, Co(NO3)2, from the "Solute” category.Gently shake saltshaker to add salt (solute) to the solvent.Keep adding until you obtain saturated solution.Record the concentration of cobalt (II) nitrate.Use Molar Concentration, M, to obtain number of moles, n, and then convert n to mass of the salt, m.Remember that the volume equals 100 mL (we can assume that the density of water is 1 g/mL so 1mL = 1g).Use n = m/MM for mass calculation, n is a number of moles, m is mass in grams, MM is molar mass in g/mol, calculated from atomic masses listed in periodic table.Record your calculations:Analyze your data and compare it with Figure 2. a solubility curves.Record your observations.Prepare complete lab report.Repeat procedure described in points 3-6 for two more salts: potassium permanganate, KMnO4, and sodium chloride, NaCl.
Solute/SaltSolution Concentration in mol/LSolution Volume in LCo(NO3)2KMnO4NaClCalculations and Data Analysis6.Using solution concentration data collected in Point 7 calculate amount of salt in grams that dissolved in 100 g water.Solute/SaltM in mol/Ln in molMM in g/molm in gSolubility in g/100g of waterCo(NO3)2KMnO4NaClNotesThis section should include notes about any observations or calculations of data collected during the lab.
Preparing Solubility Curve13.Using the following data draw the solubility graph for cobalt (II) nitrate, graph has to be included in the labreport:Temperature, °C01891Solubility, g/100g of water84.03 g98.93338.914.Use your solubility curve to obtain the temperature of your simulation. Hint: use solubility of Co(NO3)2 calculated in point 11.Report RequirementsThis section contains key information that must be included in your typed report.1.Define the problem in a manner that is clear and insightful.Identify the strategies and procedures used during the lab.Clear presentation of data including any tables or other figures that are relevant to understanding your stated conclusions at the end of the report. Include any relevant calculations performed during the lab.Clearly stated results and discussion of possible improvements to the procedure.Conclusive statements arguing in favor of your findings.2.Clear hypothesis statement and other potential solutions that identify any relevant contextual factors (i.e. real-world costs).Note: All reports will be graded using the rubric embedded within the course.Here are some questions to consider as you write your report:Does my problem statement make sense?Have I summarized my strategies/procedures well enough to be replicated by an outsider?Did I have a valid hypothesis at the start of the lab? Have I expressed this in my report?Do my tables and/or graphs make sense?Are my conclusions valid based on my supplied data?Did I thoroughly summarize my laboratory experience in a concise, factual way such that the reader can understand my processes and findings in the conclusion section alone?
1 page
Case Study
John has difficulty swallowing, loss of taste sensation in the posterior one-third of the right half of his tongue, and de ...
Case Study
John has difficulty swallowing, loss of taste sensation in the posterior one-third of the right half of his tongue, and decreased salivation, ...
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Most Popular Content
8 pages
Environmental Sustainability Proposal For Sun City
The rapid expansion of Sun City in the past thirty years has exerted immense pressure on the environment. The city's expan ...
Environmental Sustainability Proposal For Sun City
The rapid expansion of Sun City in the past thirty years has exerted immense pressure on the environment. The city's expansion is characterized by ...
UCLA Microscopy Skill Check Worksheet
I have paper at word: My required is:-1. Pre-LabFill in the total magnification for each of the lens combinations. 2. Samp ...
UCLA Microscopy Skill Check Worksheet
I have paper at word: My required is:-1. Pre-LabFill in the total magnification for each of the lens combinations. 2. Sample Problems, Determination of Specimen Size (Do these on the Skill Check Worksheet)You will be asked to determine the size of a number of specimens in this course, so the next few problems for determination of size are for practice. Determine the size of each of the specimens in the following example problems.3. Question 1: When you look at the letter “e” under the microscope, is the letter oriented in the same direction as when you look at the slide? If it is oriented differently, why do you think that might be the case (see the optics diagram in the pre-lab to help you out)Question 2: How is what you see now different from what you saw under the 4X objective? Explain what that difference is?Question 3: How is this view different from what you saw at 10X? Write a short statement that describes what is happening in what you see as you change from the 10X to 40X objectives.Question 4: When you move the stage from left to right, which direction does the image of the letter “e” move? Why do you suspect this is the case?4. Colored Threads Slide:Question 5: Do all of the strands on the slide appear to be completely in focus at the same time at this magnification?Question 6: Why do the strands appear to be in focus at some magnifications and not others? (Hint: are the threads really flat, or is there depth to them?)Activity 2Question 7: In the space below, give a general description of the look of the epithelial cells. In the pictures below, label any structures can you see (nucleus, cytoplasm, cell membrane). Estimate the size of these cells using the procedure you learned in the pre-lab.
ENV 121 NVCC How Wolves Can Change Rivers Discussion
Purpose
The discussion provides you with an opportunity to review the threats to biodiversity and evaluate endangered spec ...
ENV 121 NVCC How Wolves Can Change Rivers Discussion
Purpose
The discussion provides you with an opportunity to review the threats to biodiversity and evaluate endangered species management. You will also discuss biodiversity and the species concept, and some of the ways we benefit from biodiversity.
Directions
Please follow the discussion guideline [PDF] (Links to an external site.) to post your initial response and participate in the discussion.
Read the case study on page 227, How Wolves Can Change Rivers, and/or watch the video: Wolves of Yellowstone/Earth a New Wild [Length 5:19] (Links to an external site.)--great example of the importance of biodiversity.
Answer the questions:
1) How did wolves help the economy in the Yellowstone National Park area?
2) What are other consequences of wolf introduction that were good for humans in the park?
3) Do you think there is something similar that could be done to help with deer overpopulation in Fairfax County?
4) What would you recommend? What would the issues/concerns be?
You may use the environmental science research guide to search for information.
Environmental Science Research Guide (Links to an external site.)
8 pages
Lab 2
Computer with Google Earth software loaded (see lab 1) and Adobe Acrobat Reader with TerraGo Toolbar (see pre-lab) OR your ...
Lab 2
Computer with Google Earth software loaded (see lab 1) and Adobe Acrobat Reader with TerraGo Toolbar (see pre-lab) OR your instructor can tell you how ...
CHE 122 GMC Concentration Temperature and solubility of Salts Lab Report
CHE-122: Principles of Chemistry IILaboratory 1 Procedure – Concentration, Temperature and the Solubility of SaltsBackgr ...
CHE 122 GMC Concentration Temperature and solubility of Salts Lab Report
CHE-122: Principles of Chemistry IILaboratory 1 Procedure – Concentration, Temperature and the Solubility of SaltsBackground:Solution is a homogeneous mixture of solute and solvent, solution = solute + solvent.
Figure 1. Ionic compound, NaCl salt (solute), dissolved in water (solvent) forming the solution.In this experiment we will analyze water solutions of ionic compounds, their concentration, and solubility in water.Concentration, in our case molar concentration, is the amount of solute, expressed in moles, that is divided by volume of the solution, expressed in liters. In the formula bellow, M is a molar concentration, n is a number of moles, and V is a volume of a solution.M = n/VEquation 1. Molar Concentration.Solubility provides information about amount of solute that can be completely dissolved in solvent at given temperature. It is expressed in grams of solute per 100 grams of solvent.
Figure 2 shows the typical representation of the solubility data, that is combined in the plot called temperature and solubility curve.
Figure 2: Temperature and Solubility Curve for Various Ionic Compounds in Water.This plot can tell us the mass of salt, expressed in grams, that can be dissolved in 100 grams of water at given temperature. There are three types of solutions that are described in this graph:Unsaturated solution: The solution that does not contain maximum amount of salt that can be dissolved in 100 g of water at given temperature (all the values below the graph line for analyzed salt).Saturated solution: The solution that contains maximum amount of salt that can be dissolved in 100g of water at given temperature (the values on the graph line for the analyzed salt).Supersaturated solution: The solution that contains excess of the dissolved salt than could be dissolved by the 100g of water under normal circumstances, temperature, and/or pressure (points above the curve for the analyzed salt).Temperature and solubility of ionic compounds: Temperature allows to dissolve more solute in 100 g of water, so we say that in most cases solubility of the ionic compounds increases with temperature.
There are several objectives of this lab:To enhance your ability to perform molar concentration to mass of the solute calculations.To familiarize you with the solubility curveTo improve your comprehension of the solubility.Pre-Lab Questions:Analyze Figure 2. Temperature and solubility curve for potassium nitrate, KNO3,And answer the following questions:What property is listed on x-axis?What property is listed on y-axis?2.Using graph for KNO3, in Figure 1, decide if the following solutions would be saturated or unsaturated?110g of sodium nitrate in 100g of water at 40°C?60g of sodium nitrate in 100g of water at 70°C?a. 140g of sodium nitrate in 200g of water at 60°C?3.According to the graph in Figure 1, will 50g of sodium nitrate completely dissolve in 100g of water at 50°C? Explain.Procedure:Collecting DataFrom the course home page, access the simulation environment by clicking on the Concentrationlink.1.After the simulation environment loads, set Volume for 0.1L by clicking on the bottom faucet. If necessary, you can add water by clicking on the top faucet.Select cobalt (II) nitrate, Co(NO3)2, from the "Solute” category.Gently shake saltshaker to add salt (solute) to the solvent.Keep adding until you obtain saturated solution.Record the concentration of cobalt (II) nitrate.Use Molar Concentration, M, to obtain number of moles, n, and then convert n to mass of the salt, m.Remember that the volume equals 100 mL (we can assume that the density of water is 1 g/mL so 1mL = 1g).Use n = m/MM for mass calculation, n is a number of moles, m is mass in grams, MM is molar mass in g/mol, calculated from atomic masses listed in periodic table.Record your calculations:Analyze your data and compare it with Figure 2. a solubility curves.Record your observations.Prepare complete lab report.Repeat procedure described in points 3-6 for two more salts: potassium permanganate, KMnO4, and sodium chloride, NaCl.
Solute/SaltSolution Concentration in mol/LSolution Volume in LCo(NO3)2KMnO4NaClCalculations and Data Analysis6.Using solution concentration data collected in Point 7 calculate amount of salt in grams that dissolved in 100 g water.Solute/SaltM in mol/Ln in molMM in g/molm in gSolubility in g/100g of waterCo(NO3)2KMnO4NaClNotesThis section should include notes about any observations or calculations of data collected during the lab.
Preparing Solubility Curve13.Using the following data draw the solubility graph for cobalt (II) nitrate, graph has to be included in the labreport:Temperature, °C01891Solubility, g/100g of water84.03 g98.93338.914.Use your solubility curve to obtain the temperature of your simulation. Hint: use solubility of Co(NO3)2 calculated in point 11.Report RequirementsThis section contains key information that must be included in your typed report.1.Define the problem in a manner that is clear and insightful.Identify the strategies and procedures used during the lab.Clear presentation of data including any tables or other figures that are relevant to understanding your stated conclusions at the end of the report. Include any relevant calculations performed during the lab.Clearly stated results and discussion of possible improvements to the procedure.Conclusive statements arguing in favor of your findings.2.Clear hypothesis statement and other potential solutions that identify any relevant contextual factors (i.e. real-world costs).Note: All reports will be graded using the rubric embedded within the course.Here are some questions to consider as you write your report:Does my problem statement make sense?Have I summarized my strategies/procedures well enough to be replicated by an outsider?Did I have a valid hypothesis at the start of the lab? Have I expressed this in my report?Do my tables and/or graphs make sense?Are my conclusions valid based on my supplied data?Did I thoroughly summarize my laboratory experience in a concise, factual way such that the reader can understand my processes and findings in the conclusion section alone?
1 page
Case Study
John has difficulty swallowing, loss of taste sensation in the posterior one-third of the right half of his tongue, and de ...
Case Study
John has difficulty swallowing, loss of taste sensation in the posterior one-third of the right half of his tongue, and decreased salivation, ...
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