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Consider the change in entropy change that occurs when a box of coins that contains a perfectly ordered array of three moles of coins is shaken. Calculate the entropy of the ordered coins, and then calculate the entropy after the box has been shaken. Take the difference to calculate the entropy change of mixing the system.
calculate w and ?U when 1 mole of xenon gas assumed ideal under goes adiabatic expansion from 27?c to 127? assuming(heat capacity of constant volmue=12.5)
nknown gas effuses in 11.0 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.56 min. What is the molar mass of the unknown gas
A buffer solution is prepared by dissolving 1.50g each of benzioc acid C6H5CO2H and sodium benzoate NaC6H5CO2 in 150.0mL of solution.
how much heat (in KJ) is required to warm 10g of ice, initially at -10 degree celsius, to steam 110 degree celsius?
cube of a silver-colored metal with a volume of 64 cm3 has a mass of 672 g. The density of pure silver is 10.5 g/cm3. Is the metal pure silver?
What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3?
A solution containing 6.3 X a0^-8 M benzene and 2.0 X 10^-7 M cyclohexane gave peal areas of 3950 and 4870, respectively, in a GC experiment.
A 322 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 635 mmHg. Calculate the moles of Ar present.
Write a balanced net ionic equation and describe one of the ways for which Cd2+ will interfere with the determination of copper.
When a sample of aqueous hydrochloric acid was neutralized with aqueous sodium hydroxide in a calorimeter, the temperature of 100.0 g of water surrounding the reaction increased from 25.0°C to 31.5°C.
Acetylene gas (C2H2) is produced as a result of the following reaction. CaC2(s)+2H2O(l) = C2H2(g)+Ca(OH)2(aq) . If 32.0 g of CaC2 are consumed in this reaction, how many moles of H2O are needed?
Benzene is evaporated into a room at 1 gram per minute the room is 6 by 6 by 3 meters and has a ventialtion rate of 10 meters cubed per minute what is the steady state concentration of benzene in the room
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