Discuss aviscous liquid with an ammonia
Ethanolamine, HOC2H4NH2, is aviscous liquid with an ammonia like odor; it is used to remove hydrogen sulfide from natural gas. A 0.15 M aqueous solution of ethanolamine has a pH of 11.34. What is theKb for ethanolamine?
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Suppose a random sample of n = 25 observations is selected from a population that is normally distributed with mean equal to 106 and standard deviation equal to 12. Give the mean and standard deviation of the sampling distribution of the sample mea
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An electron gun fires electrons into a magnetic field directed straight downward. Find the direction of the force exerted by the field on an electron for each of the following directions of the electron's velocity. (Remember that an electron has a
A solution of acetic acid, CH3COOH, was left on alab shelf with an unknown concentration. The pH was found tobe 2.68. What is the concentration of the acetic acid?
The diameters of Douglas firs grown at a Christmas tree farm are normally distributed with a mean of 4 inches and a standard deviation of 1.5 inches. What proportion of the trees will have diameters between 3 and 5 inches?
A grain loader can be set to discharge grain in amounts that are normally distributed, with mean μ bushels and standard deviation equal to 25.7 bushels. If a compoany wishes to use the loader to fill containers that hold 200 bushels of grain an
While looking though a diffraction grating at a Nitrogen discharge tube, you note that light with a known wavelength of 567.9nm is visible at an angle of 37 degrees from the central antinode. How many slits are there in this diffraction grating fo
The odds that an event will occur are given by the ratio of the probability that the event will occur to the probability that it will not occur, provided neither probability is zero. Odds are usually quoted in terms of positive integers having no
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