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Explain why does acetylation of salicylic acid with acetic anydride take place at the phenolic hydroxyl group rather than at the carboxyl group?
the percentage of silver impurity in a lead sample was determined by the following procedure a sample of lead weighing
Compute the wavelength and the frequency of the photon emitted if an electron in a one dimensional box of length 10.0 angstroms (1.00x 10-9 m) makes a transition from n=2 to n=1 as well as the energy difference is entirely converted into the energ..
Explain what will happen in order for equilibrium to be established. Define both mathematically AND in words based on LeChatelier's Principle what you predict will happen
1.when we say that something gives us energy what does that mean? what is a biological definition of energy?nbsp2.what
a calorimeter contains 34.0 ml of water at 13.5 circc. when 1.80 g of rm x a substance with a molar mass of 70.0 gmol
Presume that a lemon contains 1.00 of citric acid. Explain how many milliliters of 0.115M NaOH will be required to titrate the juice from the lemon
Balance the following equations for both mass and charge. a. C3H8O (l) + O2 (g) ? CO2 (g) + H2O (l) b. K2S (aq) + Ni(NO3)2 (aq) ? KNO3 (aq) + NiS (s) c.
Make a FLOW CHART on how a mixture of phenol, benzoic acid, p-nitroaniline and anthracene can be seperated by EXTRACTION.
HA is a weak acid. An aqueous solution 0.030 M in HA has a pH of 3.93 at 25*C. What is Ka for HA
At 1045K the partial pressures of an equilibrium mixture of H2O (g), H2 (g), and O2 (g) are .040, .0045, and .0030 respectively. Calculate the value of the equilibrium constant Kp at 1045K
graphite fiber is made by modifying the microstructure into long thin ribbons in which the carbon sheets lie in the
Draw the best Lewis structure, and resonance contributors of equal energy (if any), for the molecule H2SO3 1- How many valence electrons are in your Lewis drawing
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