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One mole of an ideal gas at 298K first doubles its volume during isothermal expansion and then returns to its original volume through isothermal compression. What is the entropy change of the system during each step?
What is the basic structure of phosphatidyl cholines, and how do they work as emulsifiers? Why is there so much research interest in phosphatidyl cholines
Nuclides above the valley of stability can become more stable through which of the following processes
Consider a chromatogram containing a single analyte with retention time of 4 minutes. The mobile phase elution time is 0.2 minutes. What is the capacity factor (k') for the analyte in question?
At a certain temperature, the root mean square speed of CH4 molecules in 1610 km/h. What is the root mean square speed of CO2 molecules at the same temperature
how many kilojoules of energy are needed to convert 100 g ice at 10.0C to water at 20.0C? (the specific heat of ice at 10C is 2.01)
how many grams of sodium formate hcoona must be dissolved in a 0.250 m solution of formic acid hcooh to make 500.0 ml
calculate the amount of heat required to completely sublime 99.0 g of solid dry ice co2 at its sublimation temperature.
Calculate the pH at the equivalence point for the titration of 0.250M methylamine (CH3NH2) with 0.250M HCl. Kb of methylamine is 5.0x10^-4,
Calculate the cell potential for the following reaction as written at 75 °C, given that [Zn2 ] = 0.870 M and [Ni2 ] = 0.0130 M. The standard cell potential for the half reaction of Zn is 0.76 written as Zn (s) --> Zn2+ + 2e-
if a reation vessel contains .25 mol KO2 AND .15 mol H2O, what is the limiting reactant ? How many moles of oxygen can be formed ?
when 7.50g of magnesium reacts with 9.50g hydrochloric acid hydrogen gas is formed. what is the limiting
tablets of ki were distributed to people living around chernobyl one week after the nuclear reactor explosion occurred
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