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After 1.02 grams of NaOH are dissolved in 50.0 grams of water, and the solution cools to room tempurature of 21.5 degrees C, it is combined with an excess of HCl dissolved in 50.0 g of water at 21.5 degree C (so NaOH is the limitng reactant). If the tempurature of the combined solution rises to 27.8 degree C what is the DeltaHrxn (delta heat reaction) (in kJ/mole) for this process?
Calculate the wavelength of the light that is absorbed for the electron's transition from n = 5 to n = 6 in Be3+ ion. (ans in nm.)
Which statement best desrcibes the energy change as bonds are formed and broken in this reaction ?
The normal boiling point of methane is -161.5 C. The specific heats of liquid and gaseous methane are 3.48 and 2.22 J/g.K, respectively. What is the final temperature of methane once the system equilibriates?
you need 4.5L of nitric acid solution with ph 6. you have unlimited amounts of nitric acid solution with a hydronuim ion concentration of 0.01M. Describe how you would form the required solution from the standard solution?
Explain why when the thermodynamic reaction is added to water , the reaction is more vigorous than when the kinetic product is added to water.
Name a compound with the formula, C5H12, which will show only one peak in the NMR spectrum.
Find the vapor pressure of a solution that contains 218 g glucose in 460.0 mL of water at 30 degrees Celcius.
To the alchemists, gold was the material representation of purity. It is a very soft metal that can be hammered into extremely thin sheets. If a 1.07 g piece of gold is hammered into a sheet whose area is 30.0 ft2,
The temperature is held at 271 K. Calculate the work done by the gas(in joules). to give the appropriate sign
Calculate the amount of energy in kilojoules needed to change 423g of water ice at -10 deg c to steam at 125 deg c . The following constants may be useful:
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 35.0 by 35.0 by 25.0 cm bag to a pressure
How many moles of I3-are produced if 25.00 mL of 0.0200 M KIO3 is mixed with 3.00 grams
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