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A gas in a container is expanded by 0.25 of the original volume to a total of 15 dm^3 at constant temperature. The resultant pressure is 20 bar. What was the original pressure before the compression assuming perfect gas behavior?
Your metropolitan area has been warned by the EPA to lower sulfur dioxide and nitrogen oxide emissions or it will lose substantial federal funding. One citizen's group calls for conservation as a means of drastically reducing electricity consumption.
When sodium is heated, a yellow spectral line whose energy is 3.37x10^19 J/photon is produced. What is the frequency and wavelength of this light?
Calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic: a) a balloon is heated by adding 850J of heat. It expands,
Iron metal is coated wih nickel. Which of metals will undergo corrosion when coating is damaged? Give the scheme of electrochemical corrosion and write equations for the reactions
Hydration of alkynes (via oxymercuration) gives good yields of single compounds only with symmetrical or terminal alkynes
write the equilibrium constant expression, Kc, for each of the following reactions: a)2HBr(g) H2(g)+Br2(g). b)2BrNO(g) Br2(g) + 2NO(g). c)CH4(g)+H2O(g) CO(g)+3H2(g).
when deltaG=0; a system is at equilibrium. Use values for delta H standard and delta S standard to determind the temperature
The following data were collected for the rate of disappearance of NO in the reaction 2NO(g) + O2(g) ---------> 2NO2(g). Experiment [NO] (M) [O2] (M) Initial Rate (M/s)
How many milliliters of 0.5 M NaOH are needed to exactly neutralize 100 milliliters of 1 M HCl?
when a clean iron nail is placed in an aqueous solution of copper(ll) sulfate, the nail becomes coated with a brownish black material.
write an equation for the acid-base reaction between nitrous acid and hydroxide ion. why does the equilibrium favor the products
would a given amount of flourine react with different masses of the two hydrogen isotopes? Does this violate the law of definite proportions.
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