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Figure shows graphs of entropy vs. energy for two objects, A and B. Both graphs are on the same scale. The energies of these two objects initially have the values indicated; the objects are then brought into thermal contact with each other. Explain what happens subsequently and why, without using the word "temperature."
A compound with molecular formula C9H12O has strong infrared absorption at 3300 to 3400cm-1. The 13C NMR spectrum of this compound has six signals. Its 1H NMR spectrum illustrates three singlets at 1.1 ppm (6H), 1.9 ppm (1H), and 7.3 ppm(5H).
What is the wavelength (in meters) of photons with the following energies. In what region of the electromagnetic spectrum does each appear.
a 93.7 g 5.20 mole sample of water is heated to exactly 94.4 celsius. it is then added to 90.1 g 5.00 mole of water at
State the structures of the five alkenes having the formula c6h12 that yield n-hexane on catalytic hydrogenation.
If 0.130 mol a third gas is added with no change in volume or temperature, what will the total pressure become?
(a) Given that the molar mass of H3PO4 is 97.994 grams, determine the number of grams of H3PO4 needed to prepare 0.35L of a 1.25M H3PO4 solution. (b) What volume, in Liters, of a 1.25 M H3PO4 solution can be prepared by diluting 50 mL of a 4.5M H3..
A lead fishing weight with a mass of 68 g absorbs 146 cal of heat. If its initial temperature is 56°C, what is its final temperature.
A sample of gas has a volume of 1.55 L at 35 °C and 1.05 atm. What is the pressure (in torr) if the volume changes to 1.38 L and temperature to -28 °C.
vinyl chloride c2h3cl is a confirmed carcinogen that is sometimes found in drinking water and in the air we breathe. if
Explain what will the absorbance rates of these solutions be and from the absorbance rates, Explain how can the equilibrium constant be determined
Pure silver has a density of 10.50 g/cm3. A 22.8 gram sample reputed to be silver displaces 2.0 mL of water. Is the sample pure silver? and why?
Calculate the energy of an ultraviolet photon of wavelength 106nm and that of an infrared photon with a wavelength
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