A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 1.60 fg (where a femtogram, fg, is 10-15 g) and is swimming at a velocity of v= 1.00 μm/s, with an uncertainty in the velocity of 9.00 %. E. coli bacterial cells are around 1 μm (10-6 m) in length. The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing. She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. What is the uncertainty of the position of the bacterium? Express your answer with the appropriate units. ► View Available Hint(s) Ax= LO μA Value Units ?

A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 1.60 fg (where a femtogram, fg, is 10-15 g) and is swimming at a velocity of v= 1.00 μm/s, with an uncertainty in the velocity of 9.00 %. E. coli bacterial cells are around 1 μm (10-6 m) in length. The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing. She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. What is the uncertainty of the position of the bacterium? Express your answer with the appropriate units. ► View Available Hint(s) Ax= LO μA Value Units ?

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 43GQ: Hexane (C6H14, density = 0.766 g/cm3), perfluoro-hexane (C6F14, density = 1.669 g/cm3), and water...

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Hexane (C6H14, density = 0.766 g/cm3), perfluoro-hexane (C6F14, density = 1.669 g/cm3), and water are immiscible liquids; that is, they do not dissolve in one another. You place 10 mL of each in a graduated cylinder, along with pieces of high-density polyethylene (HDPE, density = 0.97 g/cm3), polyvinyl chloride(PVC, density = 1.36 g/cm3), and Teflon (density = 2.3 g/cm3). None of these common plastics dissolves in these liquids. Describe what you expect to see.
A study is being performed to see if there is a correlation between the concentration of chromium in the blood and a suspected disease. Blood samples from a group of volunteers with history of the disease are analyzed and compared with the results from the healthy control subjects. From the following results (Table 1), determine whether the differences between the two groups can be ascribed as chance or whether they are real at 95% confident level.
A student is examining a bacterium under the microscope, The E. coll bacterial cell has a mass of m=1.20 fg (where a femtogram, fg. is 10-15 g) and is swimming at a velocity of u 1.00 μm/s. with an uncertainty in the velocity of 2.00% E. coli bacterial cells are around 1 µm (10 m) in length. The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing. She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. Part A What is the uncertainty of the position of the bacterium? Express your answer with the appropriate units. ▸ View Available Hint(s) Az = Submit HA Value Units
(b) Shown below are three different van Deemter curves for particles of varying sizes. Propose explanations for their differences based on terms in the van Deemter equation. Thereby explaining why smaller particle size is desirable. HETP (μm) 60 9 20 0 0 2 10 5 µm 4 FLOW RATE (mL/min) 6 10 μm 3 μm 8
You are checking the accuracy of a volumetric flask marked 10.00 mL . To calculate the volume of water contained in the flask, you first measure the mass of the empty flask and the mass of the flask filled with water and take the difference. Then, you correct for the buoyancy factor and divide by the density of the water. The result of 8 such measurements is given in the table. Calculate the 95% confidence interval for these measurements with a mean of 10.03.
Use the figure below (Figure F01-7-8) to answer this question. Temperature Anomaly (°C) 106 [OSS [ [(4 10% COD -€62 · [(14) -€0.06 Annual mean 15 year mean 1:00:3 130233 1840) Which statement is a correct interpretation of the data depicted in the plot? The mean global temperature has decreased by ~0.9 °C since 1880. O The mean global temperature has increased by ~0.9 °C since 1880. O The mean global temperature has increased by ~1.1 °C since 1880. The mean global temperature has decreased by ~1.1 °C since 1880. The mean global temperature has increased and decreased since 1880 but overall, the temperature has remained constant.
In the determination of the concentration of chloride ion in water five experiments were done: 254.3 ppm, 254.7 ppm, 249.9 ppm, 252.5 ppm, and 253.4 ppm. What is the relative average deviation of this experiment? (ppm=mg/L
g) A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 0.400 fg (where a femtogram, fg, is 10- -15 and is swimming at a velocity of v = 6.00 μm/s, with an uncertainty in the velocity of 1.00 %. E. coli bacterial cells are around 1 μm (10-6 m) in length. The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing. She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. Part A What is the uncertainty of the position of the bacterium? Express your answer with the appropriate units. ► View Available Hint(s) ☐☐ Submit 00 xa μA Xh Ax = Value 016 Previous Answers X.10n Units X ?
7. From the normal curve of error, find the probability that a result is outside the limits of ±2σ from the mean. What is the probability that a result has a more negative deviation from the mean than -2σ?
How many of the following should be included in a good hypothesis? (1) A prediction of the results of the experiment (ii) A step-by-step walkthrough of how to do the experiment with specific references to amounts of reactants, glassware used, and other experimental details (iii) A summation of the data collected after doing the experiment, with comments on accuracy and precision if possible. (iv) A detailed list of chemicals that will be used (vi) A brief scientific explanation of the predicted results. Said another way, the hypothesis should include a scientific explanation of why the predicted results are expected. (v) Waste disposal procedures 0 1 O 2 O 3 0 4 0 5
A chemist analyzes a sample of iron ore furnished by the National Institute of Standards and Technology, NIST. He obtains the following results: = 10.52%, s = 0.05, n = 10. The NIST's value for this sample is 10.60% Fe. Is the chemist's result (mean) significantly different at the 95% confidence level?
A student calibrated a eudiometer by first recording the mass of the empty eudiometer followed by filling the eudiometer to the 50.00 mL line with deionized water at 22°C and recorded the mass. The mass of water was 49.012 g. What measured reading from the eudiometer would correspond to a true volume of 47.89mL?