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Problem- Calculate the pOH of a solution that results from mixing 27 mL of 0.11 M ethylamine (C2H5NH2) with 45 mL of 0.11 M C2H5NH3Cl.
The Kb value for C2H5NH2 is 6.5 x 10-4.
It is not a question in the book, so I just need the full solution of deriving!
The pH of 0.05 M benzoic acid is 2.24. Calculate the change in pH when 2.45 g of C6H5COONa is added to 20 mL of 0.50 M benzoic acid, C6H5COOH. Ignore any changes in volume. The Ka value for C6H5COOH is 6.5 x 10-5.
What is the sign of the entropy change for the heat transfer. You probably know that when two objects at different temperatures are brought into contact, heat always travels from the hotter object to the colder object; never the reverse.
Degraded state is detected with probability 0.9 (failed state with probability 1) and repair occurs in both degraded and failed states. Repair starts immediately upon detection of the failed or degraded state and restores the system to the oper..
2. The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people used the new toothpaste for 6 months. The mean number of cavities at their next checkup is 1.5. In the ge..
Study investigates whether there are differences in the outcomes of three different treatments for anxiety. The treatment conditions that are compared are treatment with medication, treatment with psychotherapy, and placebo (inactive pills). ..
What do the Fitted (predicted) values and Residuals represent? For example, there is one record in the data set with height = 54 and weight = 110. Please use these numbers to explain what is the fitted value and what is the residual.
The tosylate of (2S,3R)-4-methyl-3-phenylpentan-2-ol undergoes an E2 elimination on treatment with sodium ethoxide. Draw the structure of the alkene that is produced.
What is the mol% of Pd used in this reaction. ex: 5% mol% catalyst means that the reaction uses 5% as much catalyst as limiting reactant
Jeremy is an eight year old boy that is experiencing problems at home and at school. While at home, his mother often complains that he is very messy, disorganized, and is frequently interrupting others. At school, his teachers report that he i..
the top of Mount Everest where the air pressure is 0.35 atmospheres. What is the volume of your balloon on top of Mount Everest
After a quantity of NO2(g) is injected into the mixture, the total pressure jumps to 812 torr. Calculate the new partial pressures after equilibrium is re- established.
Question- a highly supercoiled DNA molecule is cleaved at one site by a restriction endonuclease, yielding linear DNA. Predict whether each of the following will increaes, decrease, or remain unchanged as a consequence of this treatment.
hydrofluoric acid hf has a ka value of 7.2 times 10macr 4.a. 0.250 mol of fmacr ions in the form of naf are added to
The second order rate constant for a reaction is 8.700 x 103 M-1s-1. If the initial reagent concentration is 0.90500 mol/L, determine the time (in seconds) required for the reagent concentration to reach 0.46200 mol/L.
What does delta S of a chemical equation tell you about the reaction? For example, a positive delta H would tell you that the reaction is endothermic, or a positive delta G would tell you the reaction is non-spontanous. Does the delta S value give..
a particular substance absorbs very strongly at 620 nm. at a concentration of 0.100 m this substance has an absorbance
A 12 L tank contains helium gas pressurized to 160 atmosphere. What size tank would be needed to contain this same amount of helium at 1 atmosphere
The mass of calcium fluoride that results from the reaction of 3.00 grams of calcium and 2.00 grams of fluorine is 4.02 grams. What is the percent yield?
Is the ethoxide anion considered a strong base in elimination and substitution reactions. Could you please explain your answer
Why is benzoic acid extracted into the aqueous phase when using sodium bicarbonate, whereas 2-naphthol required the use of sodium hydroxide
Chlorine can be generated by heating together calcium hypochlorite and hydrochloric acid. Calcium chloride and water are also formed.
An organic pesticide (MW 183.7) is 8.43% Cl. A 0.627 g sample containing the pesticide plus inert material containing no chloride was decomposed with metallic sodium in alcohol.
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