Determine how much caffeine should be obtained
Determine how much caffeine should be obtained when a mixture composed of 20 mL of water layer with the 25mg of caffeine in it before extraction and 2 x 6 mL for the CH2Cl2 layers.
Kp(CH2Cl2/water) = 3.0;
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Assume that the specific heat of the rocks is 0.082 J/g-k, large beds of rock are used is some solar-heated homes to store heat. Determine the quantity of heat absorbed by the 50.0 kg of rocks if their temperature increases by 12.0 degree Ce
What 20th-century developments in science and mathematics led to radical change in outlook on nature? Do you believe that prosperity enjoyed in developed world endows the responsibility to share knowledge with developing nations?
The annual snowfall in town has mean of 31 inches and standard deviation of 11 inches. Last year there were 67 inches of snow. How many standard deviations from mean is that?
Explain why does CH2Cl2 solvent (lower layer) have higher density than the water while non-chlorinated solvents like hexanes and ether have lower density than the water, i.e. what exactly is it about Cl that causes this difference?
When 50.00 mL of 0.100 M AgNO3 and 50.00 mL of HCl are mixed in a constant-pressure calorimeter, the temperature of the mixture increases from the 22.30 to 23.00degree Celsius, the temperature increase is caused by the following reaction :
Compound X has a methylene chloride/water distribution coefficient of 4.6/ explain how much of a 2.0g sample of X dissolved in the 30 mL of water will be extracted by 20 mL of methylene chloride?
Write down a balanced equation for the reaction between sodium hydroxide and benzoic acid. Explain why is the product of this reaction soluble in the aqueous layer when benzoic acid is only very slightly soluble in water?
Determine the probability that among seven randomly chosen graduates, at least one finds the job in his or her chosen field in a year of graduating.
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