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Calculate the activity and the rational activity coefficient of the water in a solution consisting of 122 g of a non-volatile solute (molar mass = 241 g mol-1) dissoved in 0.920 kg of water at 20°C. At 20°C the vapor pressure of pure water is 2339 Pa, and the partial pressure of the water above the solution is 2269 Pa.
Answer from back of textbook: aH2O=0.970; fH2O=0.980
a 45-g piece of ice at 0 degrees C is added to a sample of water at 9 degrees C. All of the ice melts and the temperature of the water decreases to 0 degrees C. How many gram sof water were in the sample?
the mass of an empty container is 76.35g. the mass of thecontainer when filled with an unknown liquid d1.25gml
calculate the attractive bonding forces between the different ions, (2) compare qualitative curves of bond energy vs. ion separation distance for the two compounds
The equilibrium constant is always greater than one for an extensive reaction 6.The value of q is always equal to the value of w for a reversible reaction 7.The energy change of the universe for any spontaneous process is always positive
the volume of 4 cubic meters of gas is kept under constant pressure. its tempeture is increased from a minus 73 degrees
Carbon dioxide, which is recognized as the major contributor to global warming as a greenhouse gas, is formed when fossil fuels are combusted, as in electrical power plants fueled by coal, oil, or natural gas
ephedrine is used as a bronchodilator and decongestant. phenobarbital is used as an anticonvulsant and sedative. what simple chemical test distinguishes these 2 medicines?
Identify the catabolic pathways used by the following bacteria : pseudomonas, lactobacillus, alcaligenes
Give four examples of systems that would behave as buffered solutions. For each of your choices indicate with chemical equations explain how the components of each buffered solution would consume additional hydronium or hydroxide ion.
Phenolphthalein,Ka= 7.0*10^-10 , is colorless in its protonated form (HX) and fuchsia in its ionized form (X-). At what pH will phenolphthalein be a perfect pink color
1. What basic factors are important in analyzing any type of crash?
What is the final dilution obtained after each dilution series shown below
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