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you weigh out 50mg of 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.
calculate the number of PCl3 molecules formed when 97 P4 molecules and 606 Cl2 molecules react?
A 25.0 mL sample of a solution of the weak base aniline, C6H5NH2, requires 25.67 mL of 0.175 M HCl to reach the equivalence point. (Kb for aniline = 4.0 x 10-10)
Write and balance net ionic equation for oxalic acid reacting with permanganate ion in acidic solution.
Calculate the amount of work in kilojoules (kj) needed to move an object that weighs 500 grams through a distance
At a certain temperature 16.7 mL of .45 M NaOH solution is required to titrate 30.0 ML of a 0.1 M KCL solution saturated with potassium bitartrate. What is the Ksp of KHT at this temperature
a student heated a .546 gram pure chemical in an atmosphere of oxygen gas until it had completely reacted the final chrominum compound weighed .798 grams what is the empirical formula of this compound?
If the initial concentration of AB is 0.210 M , and the reaction mixture initially contains no products, what are the concentrations of A and B after 70 s
DNA polymerase (DNA pol) requires divalent magnesium for activity. Alcohol dehydrogenase (ADH) requires nicotinamide adenine dinucleotide
For the equilibrium H2+CO2-> Kc= 3.18 at 1106K. If each of the 4 species was initially present at a concentration of 3.000M.
Draw a logarithmic concentration diagram showing the relationship between [CO2] and [Ch4] as a function of pE for pH=7 and [CO2] +
why is it best to cool the crucible and lid (and sample) in a desiccator rather than on the laboratory bench
Classify each of the following as a Lewis acid or a Lewis base. Drag the appropriate items to their respective bins. H-, I-, Fe3+, NO2, SnCl4, CH3OH, (CH3)3N
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