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The solubility of an unknown compound of X in ethanol is found to be 21 grams per 10 ml at 0 Celsius. Explain what is the minimum amount of ethanol needed to recrystalize a 2.0 grams sample of compound x will remain dissolved in the cold solvent (that is how much of the compound x is not reconvered after recrystallization)
Is it possible that some 3-octene could form in the reaction of 2-octanol with catalytic sulfuric acid? Propose a mechanism that explains
The pressure on 0.600 mol of neon gas is increased from .825 atm to 2.00 atm at 100 degrees celsius. Assuming the gas to be ideal, calculate the change in entropy for this process
You have a sample of bone collected from Nevada and you find that it contains strontium-90 and exhibits an activity of 2.5 Bq. How much strontium-90 was present in the bone when the animal died 45 years ago?(The half-life of 90Sr is 29 years.)
Water at 0 degrees C was placed inside a vessel maintained at low pressure by a vacuum pump. After some of the water evaporated, the remainder froze. If 1.2g of water evaporated, how much ice was obtained? Use the heats of vaporization and fusion ..
Given a 4.50 L container of helium at 298 K and 1.00 atm, and a 3.00 L container of argon at 298 K and 1.00 atm, write a brief statement to explain whether or not atoms of He and Ar in their respective containers have the same average speed.
a student combusts 504.96 grams of ethene gas c2h4. how many liters of co2 g are produced at a pressure of 0.993 atm
Trichloroacetic acid (CCl3CO2H) is a corrosive acid that is used to precipitate proteins. The pH of a 0.050 M solution of trichloroacetic acid is the same as the pH
dissolved .31 grams of KHP in 25 ml of water and it required 15.5ml of NaOH to reach end of titration, how many moles of KHP were originally present before the addition of the NaOH?
What is the molarity if pH at the stoichiometric point is 8 and the volume of base needed is twice the volume of acid being titrated? What is the molarity of the base
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added. The Ka for the conjugate weak acid of CH3CHOO- is 1.8 x 10^-5. Calculate the pH for this solution at equilibrium.
What information does a chemist obtain from the mass spectrum of a compound?
In the stepwise trihalogenation process of the methyl group in acetophenone the methyl group is initially deprotonated. This deprotonated species which bears a negative charge on the carbon atom is stabilized by resonance.
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