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Prepare a chart containing 3 horizontal bars. Label the 1st bar "Mid-IR" and the ends of the bar 400 cm-1 and 4000 cm-1. At appropriate lengths along this bar place a line for "1000 cm-1" and another line for "2000 cm-1". Below each of these 4 wavenumbers place the equivalent wavelength in micrometers. Label the 2nd bar "Visible" and the ends of the bar "400 nm" and "780 nm". Put a line on this bar for the approximate center of the region of red, orange, yellow, green, blue, indigo, and violet light. Below each of these 9 wavelengths place the equivalent wavenumber in cm-1. Label the 3rd bar "Near UV" and the ends of the bar "180 nm" and "400 nm". Place a line at the appropriate length for "300 nm" and for "250 nm". Below each of these 4 wavelengths place the equivalent wavenumber in cm-1.
Give the general Henderson-Hasselbalch equation and sketch the plot it describes (pH against amount of NaOH added to a weak acid). On your curve label the pKa for the weak acid, and indicate the region in which the buffering capacity of the system..
how many grams of dry nh4cl need to be added to 2.50 l of a 0.100 m solution of ammonia nh3 to prepare a buffer
Calculate the number of grams of calcium carbonate in the following solutions--you must show all work in detail to receive credit: (a) 25.0 mL of 0.997 M CaCO3, (b) 10.0 mL of 2.50 M CaCO3, (c) 525.0 mL of 0.501 M CaCO3, (d) 1.25 L of 3.42 M CaCO3
Define milk of Magnesia is a suspension of magnesium hydroxide in water. A common medicine, it is frequently used as an antacid for the reason that it neutralizes hydrochloric acid in the stomach
What is the strongest attractive force that must be overcome in order to do the following: a) melt pure solid phosphorus pentachloride b) boil pure liquid selenium tetrafluoride c) boil pure liquid methanol (CH3OH) d) sublime pure solid carbon dio..
Question- Initially a mixture contains .850 mol each of N2 and O2 in an 8.00 L vessel. Find the composition when equilibrium is reached at 3900°C. The reaction is: N2 (g) + O2 (g) 2NO (g) Kc= .0123 at 3900°C.
Which compound has the higher barrier to rotation about the central C-C bond: 2,3-dimethylbutane or 2,2,3-trimethylbutane. Or is the barrier to rotation for each the same? Please draw out and explain reasoning, use extra paper if necessary.
how do you go from a five membered ring diester to a six member edring fenchone? what steps do you need to
A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 20.0 is 2.15 . Assuming ideal gas behavior, how many grams of ammonia are in the flask
Question- What is the concentration of phenylacetic acid, HC8H7O2, in a solution that is 0.065 M in potassium phenylacetate, KC8H7O2? What is the pH of the solution? Ka (HC8H7O2) = 4.9x10-5
What is the freezing point of the solution. Melting point (CCl4): -22.92 C Melting point (C6H6): 5.5 C K(CCl4): 2.65 C/m K(C6h6): 3.92 C/m
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2?
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