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A system undergoes a two-step process. In step 1, it absorbs 50. J of heat at constant volume. In step 2, it releases 5 J of heat at 1.00 atm as it is returned its original internal energy. Find the change in the volume of the system during the second step and identify it as an expansion or compression.
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a hypothetical element has two stable isotopes one has a mass of 106.9051 amu with an abundance of 48.183% the other isotope has a mass of 108.9048 amu with an abundance of 51.825% what is the average atomic mass of this element
Diethyl amine density (1.0475 g/mL) Diethyl amine MW 73 Diethyl ether density (0.714 g/mL) Hint: Consider at which temperature the reaction is run. Which of the boiling points and melting points might come into play?
A 50.0-mL volume of 0.15 M is titrated with 0.25 M KOH. Calculate the pH after the addition of 20.0 mL of KOH.
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure for NH4
The extent of ionization of a weak electrolyte is increased by adding to the solution a strong electrolyte that has an ion in common with the weak electrolyte.
Caulculate the change in pH when 0.95 g of CH3COONa is added to 48 mL of 0.50 M acetic acid, CH3COOH. Ignore any changes in volume. The Ka for CH3COOH is 1.8 * 10^-5
An aqueous solution of sodium chloride in an electrolytic cell is subjected to a current of 2.50 amps for 15.0 minutes. How many mL of chlorine gas are collected at 25.0oC if the pressure if 750.0 torr
The Nernst equation is used to predict the impact of concentration on the cell potential. What value of slope does the Nernst equation predict
What is the name of the sticky gelatinous precipitate that is formed in the primary treatment process and carries away suspended dirt particles and bacteria?
A muon is an elementary particle with a negative charge equal to the charge of an electron and a mass approximately 200 times that of the mass of an electron.
curved arrows to symbolize the flow of electrons, white the stepwise mechanism for the acid-catalyzed esterification of p-aminobenzoic acid to ethyl p-aminobenzoate
A sample of gas weighs 3.718g and has a volume of 1.4L at .845 torr and 26.0 C. What is its molar mass?
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