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A process involving a perfect gas is carried out in which the temperature changes at constant volume. First, the process is carried out for a fixed value of ?T and the mass of the gas is doubled. Then, the process is repeated with the same initial mass and ?T is doubled. For which of these processes is ?S greater? Why?
What are some advantages of supercritical CO2 as a mobile phase for chromatographic separations
How much heat energy, in kilojoules, is required to convert 74.0 g of ice at -18.0 C to water at 25.0 C ?
A reaction vessel contains 13.9g of CO and 13.9g of O2. How many grams of CO2 could be produced according to the following reaction? 2CO + O2 ---> 2CO2
What volume of 0.100 M NaOH is needed to react with 11.00 g of potassium hydrogen phthalate, a monoprotic acid with a molecular weight of 132 g/mol?
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).
How many moles of MgI2 are in 1.3L of a 0.2M solution? How many moles of Mg2+ are in the solution? How many moles of I-?
When a container is filled with 3.00 mol of H2 , 2.00 mol of O2 , and 1.00 mol of N2 , the pressure in the container is 465 kPa. The partial pressure of O2 is ?
An equimolar liquid mixture of benzene and toluene at 10C is fed continuously to a vessel in which mixture is heated to 50C.
If the available valence electrons for a molecule or polyatomic ion does not complete all of the octets in an electron-dot formula, what should you do
The free energy change of the conversion of tasmainium to bulgarium was - 60 kcal and the enthalpy of the reaction was determined to be - 9.2kcal.
A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank.
The data below were taken to calibrate the instrument. An unknown protein sample gave an absorbance of 0.867. Calculate the mass (micrograms) of protein in the unknown.
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