What are the five dimensions we rely on when evaluating the quality of a service?

What is the most important aspect of planning and conducting a useful experiment?

Give one example (not listed in the textbook) for each scale of measurement (nominal, ordinal, interval, ratio). Come up with a relationship that you think exists between 2 variables. How would you study that using a correlation study? How would you study the relationship from b. using an experiment? Make sure to identify the independent and dependent variables in your study.

For a lab experiment, a student needs 250.00 mL of a 150 mM MES buffer (pKa = 6.27) at pH 6.50. The student is given solid MES base (MW = 217.22 g/mol), 1.25 M HCl, and 1.25 M NaOH. Describe how the student should make this buffer (including amounts to weigh or measure out). (show all your work)

A 6.875 gram sample of a mixture of Na₂CO₃(s) and NaI(s) is dissolved in 145 mL of distilled water. The Na⁺ molarity of the resulting solution is 0.577 M.

In another experiment 4.96 grams of the mixture is added to the 88.0 grams of 1.0 M HCl. The reaction is allowed to go to completion. The final mass after reaction is 92.03 grams.

Calculate the mass % of Na₂CO₃ and NaI in the mixture.

8. You discover an enzyme that catalyzes the reaction: AMP →

→→ → IMP + NH2. Based
on your experiments, you determine that the KM for substrate AMP is

3.0 µ

µµ µM and the kcat = 0.5 sec-1. At 8.0 mM AMP, you determine that the velocity of

the reaction is 0.6 µ

µµ µM/min. What was the concentration of total enzyme, [E]total,

used in this experiment?

Electric Drive Problem

4) How is torque related to the power rating of each of the motors? If an actual physical motor with the same specifications as the above PSIM model s is available in the lab and this experiment was actually performed in the lab, what should be the minimum current rating of the DC power source for each motor ? You may want to do an online search on this for a deeper insight into this concept

Aerobic Cellular Respiration In Beans lab experiment

1. What caused the bromothymol blue in some of the beakers to change colors?

2. What metabolic process was occurring in the beans that produced a color change?

3. What was the purpose of soaking some of the beans first?

4. What was the purpose of soaking some of the beans first?

4. What was the purpose of preparing some beakers with no beans?

During the soybean experiment the nongerminating soybeans consumed around 0.02 mL/min of oxygen. What does this tell you about the cellular respiration of the nongerminating soybeans?

Multiple Choice

A) There was no cellular respiration.

B) A little cellular respiration was taking place but not enough for growth.

C)There was enough cellular respiration occurring to allow for growth.

D) Photosynthesis was occurring instead of cellular respiration.

In the Week 4 experiment, an additional “wash” step was added to the extraction protocol. Discuss the difference between the extraction step (ethyl acetate extraction of aqueous caffeine) and the wash step (dilute base wash of the ethyl acetate layers). Your answer should mention what is happening to the caffeine and impurities in each step as well as the intermolecular forces involved in the process explain fully

Ammnona gas can be prepared by the following reaction:

Ca O(s)+2NH4Cl(s) ------------> 2NH3(g)+H2O(g)+CaCl2(s)

in an experiment, 33.0 g of ammonia gas, NH3 is produced when it was predicted that 51.2 g of NH3 would form.

a) what is the theoretical yield of NH3?

b) what is the actual yield of NH3?

c) what is the percent yield of NH3?