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A gas expands and does P-V work on thesurroundings equal to 287 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
What is the pressure of the excess gas when the reaction is complete if 5g of H2 and 10g of O2 react in a 15L container at a constant temp of 25 degrees C? I understand
A sample of CO2 has a mass of 50 grams. what is the number of molecules of carbon dioxide in the 50 gram sample
Scrubbers use aqueous slurries of calcium hydroxide to remove the SO2 from flue gases. Write a balanced equation for this reaction
For a hypothetical gas-phase reaction that is second order in A and third order in B, by what factor does the rate change if pA is decreased by 4 times and pB is doubled
The Daily Dose of Ampicillin for the treatment of an ear infection is 115mg/kg of body weight. What is the daily for a 34 lb child
A 52.0mL volume of 0.35M CH3COOH (Ka=1.8x10^-5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 31.0mL of NaOH.
Imagine that a chemist has cyclohexanone, triphenylphosphine, butyllithium, and 2-bromobutane. Draw the organic product resulting from using these chemicals in the Wittig reaction.
A polarization potential arises from a concentration difference between ions in the neighborhood of the electrode and those in the bulk of the electrolyte solution. Calculate the polarization potential in a copper electro-refining cell given the f..
With a solution in them connected by a liquid salt bridge junction filled with KNO3. In one solution you have a graphite electrode that is connected with a wire to a copper electrode in the second soution.
The balance used to measure the mass of the metal reads low (for example, it reads 19.4 g instead of an actual 19.7 g). How will this error, due to miscalculation of the balance, affect the reported specific heat value for the metal. Explain.
An aqueous solution is 28.0% by mass ethanol, CH3CH2OH, and has a density of .957 g/mL. What is the molality of ethanol in the solution
What is the retention factor for the following TLC plate if the baseline is 1 cm, elution solvent traveled 5 cm from the bottom of the plate, and the spot of interest traveled 3.5cm
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