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State the chemical formula of salt and classify the bond as ionic, polar covalent or non covalent
benzoic acid and dissolve it in 1ml of diethyl ether. this is then extracted with 1 ml of water. the ether is removed, dried with sodium sulfate and ether evaporated yielding 30 mg of benzoic acid. what is the kp value for the ether water system.
What is the theoretical yield of aspirin if 165 of salicylic acid is allowed to react with 111 of acetic anhydride?
The heat of formation of KCl(s) is -436.7 kJ/mol and the heat of formation of KCl(aq, 1 m) is -419.5 kJ/mol. Determine the heat of solution of KCl.
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places.
A hypothetical weak acid, HA, ws combined wih NaOH in he following proporions: .2 mol of HA, .08 ml of NaOH. The mixture was diluted o a total volume of 1.0 L and the pH measured. a) if pH= 4.80, what is the pKa of the acid
What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?
Calculate the final temperature of 34mL of ethanol initially at 20celcuis upon absorption of 739 J of heat. (density of ethanol =0.789g/mL )
Given that the most common mineral in limestone is calcium carbonate, describe how these limestone objects are corroded by the sulfuric acid in polluted air. What chemical reaction is involved here?
250.0 ml of 3.0M HCl are added to 400.0 ml of 6M HCl. Assuming that the volumes are additive, what is the final concentration of HCl
Copper crystallizes in a face-centered cubic lattice. If the edge of the unit cell is 351pm, what is the radius of the copper atom
When the following reaction is balanced in basic solution using the lowest possible whole number coefficients, the coefficient of H2O will be: CN-(aq) + MnO4-(aq) --> CNO-(aq) + MnO2(s)
the use of phenols such as tert-butylcatechol as free-radical scavengers is based on the fact that phenolic hydrogens
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