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Consider a cylinder piston system (the diagram looks like a cup with a disc as the piston and it is resting on 2 stoppers that portrude from the sides of the cup to hold this piston disc as a certain mimimum height. There is water below and inside the cup/cylinder. The water volume is insignificant and unmarked, just a rough representative line. The piston disc is free to move up.) The piston, made of steel (density of steel is = to 7750 kg/cubic meter) has a diameter of 10 cm and a thickness of h=5cm. The piston is resting on stoppers. Liquid water in the cylinder is initially in equilibrium with it's vapour at tempurature of 12 degrees celsius. Assume no other gases are present. If heat is supplied, the tempurature of the water/vapour mix will rise. At what tempurature will the piston start moving up?
How many mL of 6 M sodium hydroxide must be added to 5 mL of 1.5 M HCl to just react completely with all of the HCl
Predict the electronic configurations of (a) the benzen anion, (b) the benzene cation. Estimate the pi-electron binding energy in each case within the Huckel Approximation.
How many reducing ends are in a molecule of corn starch (amylopectin) that contains 200,000 residues with a branch every 100 residues? Explain
Describe the use of light absorbing reagents in amino acid chromatography. What are these reagents used for? Name two reagents that are commonly used and describe how they react with amino acids.
although pyrrole is a much weaker base than most other amines it is a much stronger acid pka asymp 15 for the pyrrole
The ester ethyl p-nitrobenzoate is more reactive towards nucleophilic acyl substitution than ethyl p-methyoxybenzoate. Explain the reactivity difference
Draw (2R,3S)-2-bromo-3-phenylpentane in the conformation from which it is most likely to undergo E2 elimination to give 3-phenyl-2-pentene.
A mixture of amino acids is subjected to paper electrophoresis at pH 6.0. The amino acids present in the mixture are Val, Glu, Phe, Ser, and Lys. Which amino acids will migrate toward the cathode? Toward the anode? Explain.
Create an outline of no more than 10 steps describing how you will regenerate the column, load your sample and collect the hydronium ion released.
A 27.21 g sample of a substance is initially at 25.4 °C. After absorbing 2591 J of heat, the temperature of the substance is 199.8 °C. What is the specific heat (c) of the substance?
What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions?
the best means of personal protection from radiation for emergency responders is the implementation of three basic
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