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Explain what is the minimum number of theoretical plates needed to distilla 1:1 mixture of toluene as well as benzene so that the first drop of distillate is 93 mol % benzene or greater?
ammonia reacts with diatomic oxygen to form nitric oxide and watervapor. when 40.0g of ammonia and 50.0 g of oxygen
The Ksp of AgCl at 25 oC is 1.6 x 10-10. Consider a solution that is 1.0 x 10-4 M NaCl and 1.0 x 10-6 M AgNO3. 1. The solution is saturated.
Explain why one would recrystallize a solid from a solvent pair. Explain how it works in terms of solubilities. What were you observing when your ethanol - water solutions became cloudy
the average concentration of sulfate ion in seawater is 2710 mg of sulfate ion per kg of seawater. what is the molarity
Titration of the excess unreacted EDTA required 11.6 mL of 0.0200 M Ca2 . The Cd2 was displaced from EDTA by the addition of an excess of CN-.
The accepted toxic dose of mercury is 300ug/day there is 180ug of mercury per cubic meter of air. ingestion of 20,000L air per day is she at risk for mercury poisoning?
Consider benzene (C6H6) in the gas phase. Write the reaction for breaking all the bonds in C6H6 using an enthalpy formation chart. And then write a reaction that corresponds to breaking all the carbon-carbon bonds in C6H6
A medical patient has the ball section of his femur replaced with a titanium implant. Assuming the implant is a perfect sphere with a radius of 1.5 inches
The osmotic pressure was found to be 1.86 torr at 25°C. What is the molar mass of the polyethylene. R= 62.4 L-torr per mol Kelvin
Compare the pH of an H2CO3 buffer (the first buffer) that contains 0.10 M H2CO3 and 0.10 M NaHCO3 with another H2CO3 buffer (the second buffer) that contains 0.15 M H2CO3 and 0.050. M NaCO3 Carbonic acid has a Ka of 4.3X 10^-7
Write balanced equations for the reactions of aqueous NaOH with excess m-toluoyl chloride and with excess thionyl chloride
0.020 mole of Ca(OH)2 is added into 400 mL of buffer solution with 0.40 M of NH3 and 0.60 M of NH4Cl. Calculate the pH of the solution. Kb=1.8*10^-5.
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