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Home many Mg of caffeine will be obtained by extracting 300 ml of water solution containing 420 Mg of caffeine with two successive 30 ml portions of methylene chloride . Assume that the partition coefficient is 9.0 . How many Mg of catfish would be obtained if the same aqueous solution is extracted once with 60 ml of methylene chloride? Come pare the two results . In both experiments we use the same amount of organic solvent. However do we isolate the same amount of product in both experiment?
If 5.36 103 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced, assuming 100% yield?
A 35.0 mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150 M NaOH solution. Calculate the pH after the following volumes of base have been added.
2A yields 3B; ?H -50 kJ. If 9 moles of B are formed during this reaction, what was the enthalpy change
In column chromatography portion of the Friedel-Crafts acylation of ferrocene, why is ferrocene yellow, acetylferrocene orange-red, and diacetylferrocene dark. What accounts for the color differences.
The following data apply to 25oC and 100kPa. Assume the specific volume Vs, and Kt are constant with respect to pressure changes. delta G(graph) = 0
Other than S=C=S; can I have S triple bonded to C single bonded to S? Wouldn't there be three electrons left on the triple bonded S; it would be sharing three when it started with six I don't understand? Help please.
Write the noble gas abbreviation ground state electronic configurations for Ag and for Ag+. which is paramagnetic
Which concentration becomes smaller as the temperature is increased from 20 degrees celcius to 80 degrees celcius
What is the final state of the system after 26.0 kJ of energy is removed from 150.0 g of water at 1 atm. The water has an initial temperature of 20.0?C . Cs(ice) 2.092 J/g?C Cs(water) 4.184 J/g?C ?Hfus ice 6008 J/mol
The initial temperature of a 344 g sample of iron is 18.2 deg C. If the sample absorbs 2.25 kJof energy as heat, what is its final temperature
What are the equations for Tin (IV) Chloride reacting with each of these? (ethanol, toluene, NaOH, dilute, HCL and conc HCL)
What will the volume of the gas be when dried and measured at STP ( vapor pressure of water at 32 degree Celsius=35.7 torr)
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