Based on the measurement uncertainty of the below instruments, which instruments would yield the lowest percent error? a. analytical balance b. top-loading balance c. serological pipette d. graduated cylinder e. burette f. volumetric flask g. Erlenmeyer flask h. beaker
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Based on the measurement uncertainty of the below instruments, which instruments would yield the lowest percent error?
a. analytical balance
b. top-loading balance
c. serological pipette
d. graduated cylinder
e. burette
f. volumetric flask
g. Erlenmeyer flask
h. beaker
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- analytical balanceb. top-loading balancec. serological pipetted. graduated cylindere. burettef. volumetric flaskg. Erlenmeyer flaskh. beaker Define the term, “measurement uncertainty”. Among the instruments listed above, which ones have the highest uncertainty? Which ones have the lowest?Which of the following is the Eofect'sequente t weighing using an Francis A. Santos analytical balance? I. Press Tare II. Weigh container and sample III. Weigh container A) II, II, I B I, II, II C II, I, I (D) II, I, III. Data Record data with units. A. Standardization of KMnO4 1. Mass of beaker/paper + ferrous ammonium sulfate Empty Beaker Beaker and Sample Sample 1 7.40709 8. 4800g Sample 2 7.4364g 9.19498 Sample 3 7.46.324 8.48993 2. Buret readings Initial Reading Final Reading Sample 1 0.00mL 27.00m L Sample 2 21.6 mL 29.5mL Sample 3 33.5mL 29.3mL Mass of Sample 1.0439 0.45269 1.0259 Volume KMnO 27.00mL 27.40 mL 25.8ML
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- 2. Choose an object around you (anything you like). Make two qualitative observations about the object you chose. 3. Give examples of types of quantitative observations. The meltine Pnt of crustalline Sulfur is l15-1I Celsisand 35.9jrams of telde Saltithe chenical neime of which issoedium chloride disralves in of lovgrams of water at 20celcius. 4. Make one quantitative observation about the object you chose earlier. 5. Give an example of a hypothesis you made in real life recently. Remember the definition of hypothesis from our earlier section of work -a hypothesis is a tentative explanation that can be tested, and is usually based on previous observations. For example: My hypothesis is that my kids sleep better when I take them on a walk of at least 15 minutes long each day. reishe takes in more suugar 6. Design an experiment to test YOUR hypothesis. Here's my experiment: This week, I'm going to take my kids on a walk every day for 7 days, and track their sleep. Then, I'm NOT going to…17. Alphonse Bertillon (1853-1914) devised the first sci- entific system of using a series of body measurements. 18. Criminal laboratories exist in the United States under the control of various governmental agencies at the and levels. 19. In Melendez Diaz v. Massachusetts, the U.S. Supreme Court addressed the practice of using lieu of in-person testimony by forensic analysts. 20. The of physics, chemistry, and geology for the identification of the crime scene investigation. in of the crime laboratory makes use is responsible for dispatching trained 21. The personnel to the scene of crime for retrieving evidence. 22. The application of science to criminal investigation was advanced by judge in Austria. 23. In Fyre v. United States the set forth, which serves as the criterion for judicial ad- missibility of scientific evidence. a public prosecutor and principle was 24. The U.S. Supreme Court held that in assessing the ad- missibility of new and scientific evidence, the trial judge does…Obtain values from the pictures found in the procedure to complete the data table below.Remember to include units!A. Data:1 Mass empty beaker2 Mass beaker + Na2CO33 Mass Na2CO3 used4 Mass graduated cylinder + HCl(aq)5 Mass empty graduated cylinder6 Mass HCl(aq) used7 Total mass before rxn: beaker + Na2CO3 + HCl(aq)8 Mass beaker + salt solution after reaction9 Mass of CO2 generated by the reaction10 Mass of beaker + NaCl (after drying)11 Mass of NaCl Generated