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1. Explain what are the strengths, weaknesses and implications of the precautionary principle as a method for deciding whether a technology must be used?
2. Compare risk or benefit analysis to the precautionary principle. Explain which of these methods do you feel would generally lead to better decisions on questions involving potential applications of technologies in society? Explain on what reasoning is your conclusion based?
3. Explain how do you think that the question of using DDT for malaria control vs. banning its use worldwide will be resolved?
1.isomerization of cyclopropane to propene is yielding the activation energy for this process is 274 kjmol. by what
A certain indicator, HA, has a Ka value of 0.000040. The protonated form of the indicator is yellow and the ionized form is red. What is the pKa of the indicator
Determine How many moles each of Na+ and Cl- are in 0.800 L A physiological saline solution contains 172mEq/ L each of Na+ and Cl-of the saline solution?
explain why nitration occurs more rapidly in a mixture of concentrated nitric and sulfuric acids than in concentrated nitric acid alone
Give the structural formula of the lewis-acid base complex which consists of one mole of phenylmagnesium bromide and two moles of diethyl ether.
A solution was prepared by mixing 0.01150 HA and 0.01150 mol of NaA in a 500 ml Volumetric flask and diluting to mark. What is the pH of the resulting solution
We can measure the concentration of HCl solution by reaction with pure sodium carbonate: 2H+ + Na2CO3 --> 2Na+ + H2O + CO2. Complete reaction with 0.967 4 (+/- 0.000 9) g of Na2CO3
a sample containing 0.35 mol argon gas at a temperature of 13 c and a pressure of 568 torr is heated to 56 c and a
In this experiment we reduced methylene blue with ascorbic acid using HCl as a catalyst. Given that the half reaction for the reduction of methylene blue is MB+(ox) +2H +2e ----->MBH2(red) (potential = 100 mV)
the native conformation of a protein represents the lowest energy state of the polypeptide. would you expect it to be
Consider a saturated solution of calcium fluoride in 0.092 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp.
how much energy is required to vaporize 48.7 g of CH2Cl2 at its boiling point if its Hvap = 31.6 kg/mol
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