Extracting caffeine from tea leaves
Question: Why is it necessary to heat the obtained mixture of tea leaves in water when conducting the experiment to extract caffeine from tea leaves?
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Calculate the theoretical mass of hydrogen chloride formed in the reaction of sulfuric acid 2.00 mol with sodium chloride 150 g. Hydrogen chloride can be prepared by the following reaction:
At the boiling point of water,the Fahrenheit temperature is 112 degrees higher than the Celsius value. At the the freezing point the difference is only 32 degrees. At what temperature do both scales have the same reading?
Question, Suppose Intel's stock has expected return of 30% and a volatility of 55% while coke has expected return of 10% and volatility of 30%. If these two stocks were perfectly negatively correlated
Consider the reaction of sulphuric acid, H2SO4, with sodium hydroxide, NaOH.
Why is it necessary to heat the obtained mixture of tea leaves in water when conducting the experiment to extract caffeine from tea leaves?
When 0.629 g of Na3PO4*12H2O (molar mass = 380.12g/mol) and 0.527g of BaCl2*2H2O (molar mass = 244.30g/mol) are mixed with water forming 500ml of solution, how many grams of Ba3(PO4)2 (molar mass = 601.96g/mol) precipitates?
The initial volume of a gas cylinder is 750.0 mL. If the pressure of a gas inside the cylinder changes from 840.0 mmhg to 360 mm hg , what is the final volume the gas occupies?
If a particular heliox mixture to be carried by a scuba diver is at a pressure of 7.00 atm, what should be the partial pressure due to helium in order to maintain the pressure due to oxygen at 0.21 atm?
If an excess of 2.45 M HCL is used with 12.75 g of sodium bicarbonate at 732 torr and 38 C, what volume of carbon dioxide is obtained?
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