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A chemical is placed in a beaker containing 20 g of soil and 500 mL of water. At equilibrium, the chemical is found in the soil ast a concentration of 100 mg . kg-1 of soil. The equilibrium concentration of this same chemical in the water is 250 µg . L-1. What is the partiion coefficient for this chemical on this soil?
Ammonium hydrogen sulfide decomposes according to the following reaction, for which Kp = 0.451 at a given temperature. If 55.0 g of NH4HS is sealed inside a 5.00 L container at this temperature, calculate the partial pressure of NH3(g) at equilibr..
A certain reaction has Ho = 29.80 kJ and So = 20.80 J/K. (a) Is this reaction exothermic, endothermic or isothermic (neither)? This reaction is . (b) Does this reaction lead to a decrease, an increase, or no change in the degree of disorder in the..
Which of the following reactives works for separating metalic ions in an aqueous solution that conatins Fe(NO3)3 and AGNO3? Explain the reason for choosing it.
to 333 milliliters of a 0.120 molar pbno32 solution 0.667 milliliteres of 0.435 molar kio3 is added. calculate the
What mass percent of ethylene glycol in water must be used to reduce the freezing point of the mixture to -5.0degrees c?
Calculate the number of moles of hydrogen gas that can be produced by the reaction of excess water with 8.75 x 1021 atoms of barium.
A common way of removing Cr3+ from solution is by precipitation of Cr(OH)3(s). An environmental engineer tells you that adjusting the pH to 8.5 will decrease total soluble Cr(III) to below 1 mg/L (1.92 x 10-5 M). Is this true?
What is the persent yield of diethyle ether. b, During the proecess 45% of ethanol that did not produce diethyl ether react by the side reaction. What mass of ethylene is produced
To obtain the same antifreeze protection requires 76g of propylene glycol to replace each 62g of ethylene glycol. Calculate the mass of propylene glycol required to replace 7.00gal of ethylene glycol. The density of ethylene glycol is 1.12 .
For the gas-phase reaction shown below, choose the answer which indicates how the rate of change of H2O is related to the rate of change of C3H6.
What is this hardness concentration expressed in ppm CaCO3. THe hardness of a water sample is known to be 500 ppm CaCO3. IN an analysis of a 50 mL water sample, what volume of 0.0100 M Na2H2Y is needed to reach the endpoint
Calculate the pH in the titration of 25.0 mL of 0.100 acetic acid by sodium hydroxide after the addition
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