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Initially 5 mol of an ideal gas with Cv,m=12.5 J K^-1 mol^-1 are at a volume of 5 dm^3 and a temperature of 300K. If the gas is heated to 373 K and the volume changed to 10 dm^3, what is the entropy change?
A large cylinder of helium filled at 2000 lb/in^2 had a small orifice through which helium escaped into a space at the rate of 6.4 mmol/hour. How long would it take for 10 mmol of CO toleak through a similar orifice at the same pressure
A chemist produces 460 mL of oxygen gas at - 43 °C and constant pressure. To what Celsius temperature must the oxygen be warmed in order for it to have a volume of 600 mL?
A compound with a molecular formula C9H12, showed the following signals in its 1H NMR spectrum: ? (CDCl3, ppm): 7.5-7.0 (m, 5H), 2.3 (septet, 1H), 1.3 (d, 6H).
What is the pH of the sodium phosphate buffer described in problem if 1 ml of 10M NaOH is added? What is the pH of 1 liter of water if 1ml of NaOH is added?
When Heated, KClO3 decomposes into KCl and O2. 2KClO3 arrow 2KCl+3O2 If this reaction produced 25.8 g of KCl, how much O2 was produced (in grams)
what is the relative error in the determination of a density for which the accepted value is 0.945 g*cm^-3 and the experimental value
Calculate the ionic strength of a solution that is made .1222 M AgNO3, plus .0215 M MgCl2, plus .140 M AlCl3
The oxygen atom (with its 2s orbital) forms a s bond with one of the three sp2 hybrid orbitals of the carbon atom; the two hydrogen atoms (with their 1s orbitals) each form a s bond with one of the three sp2 hybrid orbitals of the carbon atom.
The volume of ice has been estimeted to be 2.85 x 10^6 km^2. The density of ice is 918 kg/m^3. The radius of the earth is 6378.16 km. If the oceans represent 70.8% of the earths surface, calculate the increase in ocean depth that will result from ..
The bromocresolgreen end point of the titration was reached after the addition of 30.00mL of hydrochloric acid solution. Calculate the concentration of the acid solution
The pH at the half-neutralization point. Enter only numbers in your answer. (Do not include units.) (d) The pH at the equivalence point.
water in order to raise the boiling point of the solution by 0.5 C? Assume the ideal van't Hoff factor for NaCl.
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