Measurement of optical activity
You have a pure sample of 2-pentanol but discover that it does not rotate plane polarized light. The measurement of optical activity is done correctly. What is the most likely explanation?
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Analysis shows that there are 2.50 moles of H2, 1.35 10-5 mole of S2, and 8.70 moles of H2S present in a 12.0 L flask. Calculate the equilibrium constant Kc for the reaction.
SN1 substitution and E1 elimination frequently compete in the same reaction. (a) Propose a mechanism and predict the products for the solvolysis of 1-bromo-1-methylcyclopentane in ethanol.
Question: A 3.0 g bullet of specific heat 128 J/kg.degree C is moving at 180 m/s and enters a bag of sand then stops. If all kinetic energy is converted into heat, by what amount is increase in temperature of bullet?
Assuming the temperature is constant, predict whether the change in entropy (delta S) is positive, negative or zero during the followings reactions.
What mass of NaOH (s) must be added to 1.0 L of 0.050 M NH3 to ensure that the percent ionization of NH3 is no greater than 0.0010%? Assume no volume change on addition of NaOH.
A falling sky diver reaches terminal speed with her parachute closed. After the parachute is opened, what parameters change to decrease this terminal speed?
What should be the index of refraction of a transparent sphere in order for paraxial rays from an infinitely distant object to be brought to a focus at the vertex of the surface opposite the point of incidence?
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