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what must a solute's distribution be if 99% of the solute in a 50.0ml sample is to be extracted with (a) a single 50 ml portion of an organic solvent? (b) two 25 ml portions of the organic solvent?
Large beds of rocks are used in solar-heated homes to store heat. Assume that the specific heat of rocks is 0.82J/g-K. a. Calculate the quanituty of heat absorbed by 50.0kg of rocks if their temperature increases by 12.0 C. b. What temperature cha..
Arranging the atomic cores appropriately, write the Lewis structure for SiO2 in the box. Use electron pairs to show the bonds between the atoms. Distribute the remaining electrons so that each atom has an octet.
the heat of fusion of a compound is 126 joules per gram. What is the total number of joules of heat that must be absorbed by 15.0- grams sample to change he compound from solid to liquid at its melting point?
The boling point of water in city a is 94 degrees celcius and in city b it is 97 degrees celcius. which is at the higher elevation.
Which electrode gains mass and which loses mass as the cell reaction proceeds. What is the equation for the equation for the overall cell reaction. What is the emf generated by the cell under standard conditions
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C.
Arrange these compounds in order of increasing boiling point: CH3CH2CH2OH CH3CH2CH3 CH3CH3 CH3CH2CH2Cl Rank from smallest to largest
The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48°C. For the process H+(aq) + OH-(aq) H2O(l), the heat of neutralization is -56.2 kJ/mol. What is the final temperature of the mixed solution?
Which protein elutes first from a carboxymethyl cellulose ion exchange column with an increasing pH gradient
The excess I2(aq) left over from the above reaction was titrated with 11.37 mL of 0.0105 M thiosulfate (S2O32-) as follows: I2(aq) + 2S2O32-(aq) → 2I1-(aq) + S4O62-(aq)
The acid-catalyzed addition of alcohols to alkenes occurs via a mechanism analogous to acid-catalyzed alkene hydration. The reaction occurs in 3 steps
Consider the reaction COg) + NH3=HCONH2, Kc=0.800. If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 M &2.00M, respectively, what will the concentration of HCONH2 be at equilibrium
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