Hi,

This question is in reference to my lab: Determination of Acetic Acid (using vinegar as a titration). 5ml of vinegar was used in the titration and 1M NaOH.

I need to know how to calculate the data for my “Vinegar Sample 1” . I have 6 question marks that I am not sure how to calculate. After you show me how to do it, I can calculate my other samples.

Thank you kindly!

CH3CO2H + NaOH → NaCH3CO2 + H2O

Mass of Vinegar: 5.09

Volume of Vinegar (Density = 1.005 g/mL): ?

Initial NaOH volume in syringe: 10ml

Final NaOH volume in syringe: 5.5ml

Volume of NaOH Delivered: 4.5ml

Moles of NaOH Delivered: 0.0045 moles?

Moles of Acetic Acid in Sample: ?

Mass of Acetic Acid in Sample: ?

Calculated Molarity of Acetic Acid in the sampled vinegar: ?

Calculated Percent Mass of Acetic Acid in sampled vinegar: ?

 

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Hi, this question is from Prof to Prof in radio telecom.It is known that the suppressed carrier of double-sideband suppressed-carrier AM signal (DSB-SC, not DSB-RC or with a pilot) can be recovered (frequency and phase) from the two sidebands by one of the two methods: “Costas Loop based on I & Q” and “the Squaring Method based on selective filter”. Both make the DSB-SC demodulator rather complex and/or sensitive in comparison to other detectors. There is a third method which is much simpler and not sensitive. It is not known yet by any university in the world since it uses the conventional simple Phase Locked Loop; phase comparator, RC filter and VCO. Obviously a minor change is added to the PLL, otherwise and as we all know, the loop cannot be locked to the suppressed carrier at its input. So I wonder if there is a university that might be interested to include this third very simple method in its course of communications. Perhaps it is time not to keep telling the graduate students that DSB-SC is harder to demodulate than the SSB-SC though the former takes twice its bandwidth! For instance, I used to hear this statement since I was at the university in the 70’s. Just in case, I prepared the new loop circuit, on the simulator LTspice, which demodulates a DSB-SC at 455 KHz (AM IF) as an example. Thanks.

 

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Hi this question does not have to deal with any problems. I have the option of either retaking organic chemistry 1 to get a better grade or to take a whole different course analytical chemistry. I took organic chem 2 and did pretty well. Only difficulty i had for organic chem 2 was the reading of spectroscopy. As i dont know the nature and material of analytical chem which do you advise i take. Analytical chem is a 3 credit course while organic chem is 5. Which is more difficult ? and which do you think i will be better off taking

 

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Hi, this is the instruction for my 2-3 paragraph discussion board:

Marilyn is the manager of a Medical Surgical unit in a busy city hospital. Budget time is approaching, and administration has become increasingly intolerant of overtime. Marilyn has been studying the payroll sheets for her unit, and she now recognizes that 4 nurses have been responsible for over half the end of shift overtime hours. These nurses have all been working on this unit for over 8 years, and provide exemplary patient care. The following are Marilyn’s observations concerning these nurses:

-Care provided is safe and thorough.

-Report is given promptly and thoroughly.

-Seldom are tasks carried over for the next shift.

-Nurses following these nurses are confident that the care and the report were complete.

-Almost all documentation by these nurses is done after their shift.

In view of these observations, Marilyn feels she needs to address the overtime issue with these nurses. She wants to be sure they know she appreciates their quality contributions to the unit.Discuss the following points:

1-How should Marilyn address this time management problem?

2-Where should documentation fall as a priority?

3-How might appropriate delegation help?

4-What action plan would you suggest?Your response should consist of complete sentences and should be at least one complete paragraph, but it should be no more than three paragraphs in length

 

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