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The compound α-amanitin is the principle toxic compound found in the poisonous mushroom species, Amanita phalloides, which iscommonly knonw as the death cap. This compound binds to the enzyme RNA polymerase II, the principle enzyme responsible for copying DNA to produce messenger RNA. It is estimated that ingestion of about 30 g of the mushroom cap, or about half of one cap, is sufficient to kill a human. The LD50 (lethal does 50%, or the does at which half of the individuals receiving this dose die) is reported to be 0.1 mg/kg of body weight. How many molecules of α-amanitin are in the LD50 dose for a typical 70 kg adult human male? The molecular mass of α- amanitin is 918.97 g/mol.
For the following pair of polymers, state whether or not it is possible to determine whether one polymer is more likely to crystallize than the other. 1) linear and syndiotactic polypropylene
Given the Ksp values for the following precipitates, please predict which precipitate has the largest solubility in the presence of 0.01 M of its composing anions (e.g., in the presence of 0.01 M Cl- ion for AgCl(s)):
How many mL of 0.500 M stock acid and 0.250 M NaOH base solution must be used in preparation of this buffer? Check both answers.
Calculate the steric strain for the most stable chair conformer and for a less stable conformer for the following
Explain what is the volume (mL) of alcohol needed for this reaction. Illustrate all steps of your calculations. Include all units as well as any references
A 12.0 mL sample of a compound has a density of 1.44 g/mL. What is the weight of the sample in g?
What is the rate of consumption of O2 in a combustion reaction carried out in a 11.00 L flask if 6.30 mmol of oxygen is consumed in 25.6 s?
What is the percent yield of a reaction in which 244 g phosphorus trichloride reacts with excess water to form 144 g HCl and aqueous phosphorus acid (H3PO3)?
What is the pH at the equivalence point. f) What indicator would be most suitable for this titration. g) What is the pH when 105% of the required base has been added
What is the pH at the equivalence point for a titration of 35 ml of 0.250 M acetic acid with 0.350 M Ba(OH)2? Ka for acetic acid is 1.8 x 10^-5
consider the given equation asnbsp 2naclaq h2o --gt cl2g h2 g 2naoh aq it shows the electrolysis of a brine solution
What is the molarity of a solution of 14.0 g NH4Br in enough H20 to make 150 ML of solution.
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