I am taking comp 100 it's word, excel, powerpoint, and access. i have grader projects that i have to do

4-5:FreezingPointDepression

 

If youdissolve a substancesuch as ordinarytable salt (NaCl) in water, the freezing point of the water will decrease relative to the freezing point ofthe pure water. This property is used tomelt the snow or ice on roads during the winter or to make homemade ice cream. In this assignment, youwill dissolve a sample

of NaCl in water, add some ice, andthen measure the freezing point depression.

 

1.    Start VirtualChemLab, select Colligative Properties,and select Freezing Point Depression fromthe list of assignments. The lab will open in the Calorimetry laboratorywith a beaker containing45.00g of iceand a coffee cup calorimeter on the lab bench.  A sampleof sodiumchloride (NaCl) will also be on the balance.

 

2.    Click on theLab Booktoopen it. Record the mass of the sodiumchloride in the data table.  If it is too small to read,click on theBalance areato zoomin, record the mass, and then return to the laboratory.

 

3.    100 mL of water is already in the calorimeter. Use the densityofwater at 25oC (0.998 g/mL) to determine the mass from the volume andrecord it in the data table. Make certainthe stirrer isOn

(you shouldbe able to see the shaft rotating). In thethermometer window, clickSave to begin recording data in the lab book.Allow 20-30seconds to obtain a baseline temperature of the water. Click the clock on the wall labeledAccelerate to accelerate the laboratory time if necessary.

 

4.    Drag the beaker of ice until it snaps into place above the calorimeter and then pour the ice into the calorimeter.Click the thermometer and graph windowsto bring themto the front andobserve the change intemperature in the graph window until it reacheszero.Drag the weigh paper fromthe balance to the calorimeter and thenpour it intothe calorimeter. Observe the change in temperature until it reaches a stableminimumand clickStopin thetemperaturewindow. A data link icon will

appear in the lab book. Click the data link icon and record thelowest temperature after adding the salt

in the data table. (Remember that the watermayhave begun to warmback up.)

 

5.    If you want torepeat the experiment, click on the reddisposal bucket to clear the lab, click onthe Stockroom, click on the clipboard, and select Preset Experiment #1, Freezing Point Depression – NaCl.

 

DataTable

mass NaCl

 

mass water

 

mass ice

 

mass water +ice

 

minimumtemperature

 

 

 

6.    The freezing pointdepression can be predicted using the equation   ∆T=Kf x m x i, where  ∆T is the

change in freezing point, iis the number of ions inthesolutionpermole of  dissolved NaCl (i = 2), m

is themolality of the solution, and K isthe molal freezing point constant for water which is

1.86oC/m.

 

 

 

 

 

 

 

 

 

107

 

Virtual ChemLab: General Chemistry, Student Lab Manual/Workbook, v4.5, Third Edition, by Brian F. Woodfield and Matthew C. Asplund. Published by Prentice Hall.

Copyright © 2013 by Pearson Education, Inc.



Colligative Properties

 

 

 

Calculate the predicted change in freezing point for your solution.

 

 

 

 

 

 

 

 

 

7.    The change in freezing point must be subtractedfrom the freezing pointof purewater, whichis 0.0

oC, in order to compare the predicted freezing pointwith the actual freezing point.

 

 

 

What is the calculated freezing point of the solution?Compare this to the actualfreezing point.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

help with 8 pages

2-13:CreatingaSolutionofKnownMolarity

 

 

In this assignment, you will weigh out asample of baking soda (NaHCO3) and create a solution ofknown molarity.

 

1.    Start VirtualChemLab, select Reactions and Stoichiometry,and then select Creating aSolution of Known Molarityfromthe list of assignments.The lab will open in the Titration laboratory.

 

2.    In the laboratory, a bottle of baking soda (sodiumbicarbonate, NaHCO3) will be next to thebalance, and an emptybeaker will be on the stir plate.  Drag the emptybeaker to the spotlight next tothe balance, clickin the Balance area to zoomin, place aweigh paper on the balance, and tare the

balance.

 

3.    Open the bottle by clicking on the lid (Remove Lid). Pick up the Scoopand scoop out some sample by first dragging the scoop tothe mouth of the bottle and then pullingthe scoop down the face of the

bottle. As the scoop is dragged down the face of the bottle it will pickup different quantities ofsolid. Select the largest sample possible and drag the scoop tothe weighing paper on the balance until it

snaps in place and then let go.  This will put approximately1 gofsample on the balance.  Repeat

with a second Scoop. Record the mass of the NaHCO3  in the data table.

 

4.    Drag the weigh paper to the beaker and add the NaHCO3  sample tothe beaker. Click on thegreen

Zoom Out arrow to return tothe laboratory.

 

5.    Drag the beaker to the 50mL graduated cylinder (thelargest one) by the sink and emptythe sample

into the cylinder.  Hold thecylinder under the tap until it fills withwater tomake an aqueous solution

of NaHCO3. (When the graduated cylinder is full it will automatically snap back into place.) Note that the solid is added and dissolved before the volume ismeasured whenmaking a molar solution.

Chemists normallyuse a volumetric flask for making molar solutions, but this is not available in the simulation.

 

6.    Determine the liters of solution inthe cylinder and record the data in thedata table.

 

7.    Determine the moles of NaHCO3  in the sample and record the datain the data table.

 

 

DataTable

 

mass NaHCO3

 

moles NaHCO3

 

liters solution

 

 

 

 

8.    Themolarityis calculated using the formula:

Text Box: ISBN 1-269-57297-0

 

 



mass solute

molarity =                    =                    molarmasssolute



molessolute

 

Lsolution



Lsolution



 

 

 

 

67

 

Virtual ChemLab: General Chemistry, Student Lab Manual/Workbook, v4.5, Third Edition, by Brian F. Woodfield and Matthew C. Asplund. Published by Prentice Hall.

Copyright © 2013 by Pearson Education, Inc.



ReactionsandStoichiometry

 

 

 

 

Calculate the molarity of the NaHCO3  solution inunits of mol/L.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 2-13:CreatingaSolutionofKnownMolarity

 

 

In this assignment, you will weigh out asample of baking soda (NaHCO3) and create a solution ofknown molarity.

 

1.    Start VirtualChemLab, select Reactions and Stoichiometry,and then select Creating aSolution of Known Molarityfromthe list of assignments.The lab will open in the Titration laboratory.

 

2.    In the laboratory, a bottle of baking soda (sodiumbicarbonate, NaHCO3) will be next to thebalance, and an emptybeaker will be on the stir plate.  Drag the emptybeaker to the spotlight next tothe balance, clickin the Balance area to zoomin, place aweigh paper on the balance, and tare the

balance.

 

3.    Open the bottle by clicking on the lid (Remove Lid). Pick up the Scoopand scoop out some sample by first dragging the scoop tothe mouth of the bottle and then pullingthe scoop down the face of the

bottle. As the scoop is dragged down the face of the bottle it will pickup different quantities ofsolid. Select the largest sample possible and drag the scoop tothe weighing paper on the balance until it

snaps in place and then let go.  This will put approximately1 gofsample on the balance.  Repeat

with a second Scoop. Record the mass of the NaHCO3  in the data table.

 

4.    Drag the weigh paper to the beaker and add the NaHCO3  sample tothe beaker. Click on thegreen

Zoom Out arrow to return tothe laboratory.

 

5.    Drag the beaker to the 50mL graduated cylinder (thelargest one) by the sink and emptythe sample

into the cylinder.  Hold thecylinder under the tap until it fills withwater tomake an aqueous solution

of NaHCO3. (When the graduated cylinder is full it will automatically snap back into place.) Note that the solid is added and dissolved before the volume ismeasured whenmaking a molar solution.

Chemists normallyuse a volumetric flask for making molar solutions, but this is not available in the simulation.

 

6.    Determine the liters of solution inthe cylinder and record the data in thedata table.

 

7.    Determine the moles of NaHCO3  in the sample and record the datain the data table.

 

 

DataTable

 

mass NaHCO3

 

moles NaHCO3

 

liters solution

 

 

 

 

8.    Themolarityis calculated using the formula:

Text Box: ISBN 1-269-57297-0

 

 



mass solute

molarity =                    =                    molarmasssolute



molessolute

 

Lsolution



Lsolution



 

 

 

 

67

 

Virtual ChemLab: General Chemistry, Student Lab Manual/Workbook, v4.5, Third Edition, by Brian F. Woodfield and Matthew C. Asplund. Published by Prentice Hall.

Copyright © 2013 by Pearson Education, Inc.



ReactionsandStoichiometry

 

 

 

 

Calculate the molarity of the NaHCO3  solution inunits of mol/L.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Emerging Markets: Amazon.com of Russia

Prepare a paper (700 to 1,050 words) incorporating answers to the questions below. It is important to address each of the questions presented. CSU requires that students use the APA format in writing course papers; therefore, the APA rules for formatting, quoting, paraphrasing, citing, and listing of sources are to be followed. The Reference List is not included in the required paper length. Your paper must contain at least five references, which may include your course textbook, internet sources, books, and professional journals or other appropriate resources. Research and choose one international corporation to discuss. You may use the Fortune Global 500 to help you choose a corporation (http://money.cnn.com/magazines/fortune/global500/2009/). The corporation you choose may be headquartered in either the United States or a foreign country. You should incorporate concepts from your reading assignment into your answers.

1. Provide a company overview, and identify the countries in which the corporation operates.

2. Identify the types of market systems and types of legal systems that exist in the countries where the corporation 

operates. What effect do these have on the company’s operations?

3. Discuss the possible sources of political risk for: (a) the countries in which the company has a presence and 

(b) the basic nature of their products and operations. If you were a political consultant for the company, how 

would you suggest the company approach its political risk given trends in international political systems?

4. Identify the stakeholders the company must satisfy. Why is this process more difficult for companies operating 

internationally?

5. Summarize the company’s code of conduct. State the reasons why it is in the company’s best interest to follow its code of conduct when operating in foreign countries.

6. Does the company have any social programs in the country/countries where it operates? If so, briefly describe 

one.

7. What are the indicators the company might monitor to guide their investment and actions in the future?

 

 

 

I need help with these thirteen financial problems.

9 multipile choice questions and one problem need to be solved so the totall 10 questions.

Weekly tasks or assignments (Individual or Group Projects) will be due by Monday and late submissions will be assigned a late penalty in accordance with the late penalty policy found in the syllabus. NOTE: All submission posting times are based on midnight Central Time.

To test your team members’ ability to think strategically and apply what you have taught them to real businesses, you asked each one to create a presentation on a particular industry, addressing the following:

  • What is (are) the major strategic issues that the industry faces?  
  • What strategic options does it have to address those specific issues? 
  • For each option, what changes in information systems (internet, telecommunications and networks, software, hardware, data, simulations, eLearning) may be needed? 
  • What strategic option do the team members recommend? Include support for the recommendation using available descriptive and inferential statistics. What is its probability for success? 
  • What are the risks of implementing that chosen option? Write a hypothesis and null hypothesis for each risk and describe how it will be tested. 

You are to choose a company from one of the following industries:

  • The current market leader in the car rental industry 
  • The current market leader in the U.S. hotel industry 
  • The market leader in the fast food industry