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What would happened if HCl was accidentally used instead of Na2CO3 to extract caffeine from tea bags? Would you be able to fix your mistake? How? (Lab info... 2 tea bags were brewed in Na2CO3 then the organic layer with caffeine was removed using dichloromethane)
A nuclear explosion generates so much heat that it turns steel structures in the immediate area into steel vapor. What is the correct name of the type of phase transition that is represented by this process
What is the net ionic equation for the reaction that occurs when small amounts of hydrochloric acid are added to a HOCl/NaOCl buffer solution
Suppose that you wanted to be sure that a metal ion, any metal ion, would dissolve in water. What salt of the metal ion compound would you choose
calculate how many protons are required to pass through the xeno-FoF1-ATP synthase complex to synthesize one ATP.
The activation energy for the reaction NO 2 (g)+CO 2 (g)?NO(g)+CO(g) is E a = 100kJ/mol and the change in enthalpy for the reaction is ΔH = -200kJ/mol. What is the activation energy for the reverse reaction?
Protein X contains 16.78% nitrogen. A 0.4100 mL aliquot of protein X solution was digested, and the liberated NH3 was distilled into 10.00 mL of 0.02260 M HCl. Unreacted HCl required 3.07 mL of 0.01960 M NaOH for complete titration.
For the reaction 2CH4(g) +3Cl2(g) -> 2CHCl3(l) + 3H2(g), the standard enthaly of change of reaction = -118.6KJ. The standard enthalpy of change of reaction
why do we need to excess FCR? Also give 3 reasons why gallic acid is used as standard for the total phenolic assay?
Once made by heating wood in the absence of air, methanol (CH3OH) is now made by reacting carbon monoxide and hydrogen at high pressure
a .350 g sample of a biomolecule was dissolved in 15.0 g of chloroform, and the freezing point depression was determined to be .240 degree celcius. Calculate the molar mass of the biomolecule.
Calculate the number of moles of sodium hydroxide used in the titration. b. How many equivalents of unknown acid were titrated? c. Determine the equivalent mass of the unknown acid
calculate the amount of energy as heat by the freezing of 13.3 g of a liquid substance. given that the substance has a molar mass of 82.9g/mol and a molar enthalpy of fusion of 4.60 kj/mol.
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