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Assuming no heat loss to the surrounding environment, determine the minimum duration of time necessary for a 100 W aquarium tank heater to raise the temperature of 20.0 gallons of water by a difference of 10.0°C.
If the density of an unknown gas is .0985 g/l at 25 degrees Celsius and 725 torr, calculate the density of the unknown gas at 48 degrees celcius and 740 torr
A photoelectron spectroscopy experiment is conducted in which light with a wavelength of 58.4 nm is directed at a sample of rubidium, resulting in the ejection of the electron
Choose the correct expression for Keq and description (homogeneous or heterogeneous) for the following reaction: Cr3+(aq) + 3 Ag(s) Cr(s) + 3 Ag+(aq)
An analytical procedure requires a solution of chloride ions. how many grams of caCl2 must be dissolved to make 2.15 L of 0.0520 M Cl-.
what is the percent yield for the reaction of 500. g of cs2 and excess o2 if 768. g of so2 was recovered in the
A bowl of 510 g of water is placed in a microwave oven that puts out 611 watts (J/s). How long would it take in seconds to increase the temperature of the water from 12.0oC to 49.5oC
consider a hydrogen atom in its ground state. what is the energy of its electron? consider the hydrogen atom in an
what is the wavelength of the line in the Balmer series of hydrogen corresponding to the transition for n=5 to n=2? the constant for Balmer's equation is 3.2881*10^15 s-1
Use Le Chatelier's principle to explain why the buffer prevents large changes from occuring in PH when
Calculate the amount of 6M NaOH required to react completely with 1.51 grams of Methyl Salicylate. How much of the 6M NaOH that you used was in excess of the theoretical amount?
A protein biochemist attempted to determine the amino acid sequence of a decapeptide. Use the results from the trypsin, chymotrypsin, and cyanogen bromide treatments to suggest the amino acid sequence of this decapeptide.
How many grams of Helium does a 25.0 Liter balloon contain at 102.0 kPa and 24 degrees Celsius?
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