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A sample of aspirin to be purified has a mass of 1.0g. Aspirin has a solubility of 1.0g in 30ml of water at 37Celcius and a solubilty if 0.10g per 30 ml at 25 Celsius. The sample is dissolved in 30 ml of hot water and cooled to 25 Celcius. How much aspirin would be crystallized? How much aspirin would stay in solution. What is the percent yield of aspirin would be recovered?How could you recover a higher percent of aspirin?
Experiments have shown that the average frequency of chirping by a snowy tree cricket depends on temperature as shown below
Show the Chemical behavior of an atom - The chemical behavior of an atom is determined by most directly by the
An insulated tank is divided into two equal parts. Both halves contain the same ideal gas but one is at 300K and 2 bar while the other one is at 1 bar.
calculate the number of gramso f magnesium that can be produced by suipplying 1.00 F tot he electrode.
The standard potential of the Cell Pt|H2|HBr|AgBr|Ag was found to be +0.07372 at 293 K and +0.06873 at 303 K. Evaluate the standard reaction Gibbs energy, enthalpy, and entropy
A 2.20 g sample of a large boimolecule was dissolved in 13.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
what is the acid dissociation constant of a weak acid if a concentration of 0.3 M gives a hydrogen ion concentration of 0.001M?
The solution of iron (III) chloride used in this experiment is 0.02M. Determine the amount of iron (III) chloride hexahrdrate
if 2.3g of sodium reacted with 1.3g of water,what would be the total mass of sodium hydroxide and hydrogen produce?
Assume that algae need carbon, nitrogen and phosphorus in the atomic ratio 106:16:1. What is the limiting nutrient in the lake that contains the following concentrations: total carbon = 20 mg/L, total N = 0.80 mg/L and total P = 0.16 mg/L.
Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions
For the reaction above, how much would be liberated by the combustion of 5.00g of iron metal in excess oxygen.
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