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For the following processes, indicate whether the signs of ?H and ?S are expected to be positive, negative or about 0. For each, indicate whether the process is always spontaneous, never spontaneous, spontaneous at high temperature or spontaneous at low temperature. (a) The temperature of a sample of Co(s) is lowered from 60°C to 25°C. (b) Ethyl alcohol evaporates from a beaker.
Find the volume in cubic centimeters of a box 25 mm x 12 cm x 0.20 m. How many grams of water should the box hold. The density of water is 1 g/mL and 1 cubic centimeter equals 1 mL.
Calculate the [NH3] and [H4Cl] in the buffer solution. Calculate the pH of the buffer solution.
Steel wool wetted with vinegar is sealed within a balloon inflated with air. After several hours, what happens to the volume of the balloon?
Calculate the sulfur hexafluoride partial pressure when a circuit breaker with this gas mixture reaches its rated limit of -40.0 degree celcius. How does the density of the gas in the circuit breaker change as the temperature drops
which molecule will undergo only London dipersion forces when interacting with other molecules of the same kind?
A solution of acetic acid, HC2H3O2, on a laboratory shelf was of undetermined concentration. If the pH of the solution was found to be 2.39, what was the original concentration of the acetic acid? ___M
A 4.60 g nugget of pure gold absorbed 288 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C? The specific heat of gold is 0.129 J/(g·°C).
Determine the Ka value of acetic acid at 105 degrees C from the following data: A 0.3 Molar aqueous solution of acetic acid shows a pH of 2.642 at 105 degrees C. You can use the approximation formula here because the concentration of the acetic ac..
Calculte w and delta E for the vaporization of 1.00 mol water at 100 degrees celsius and 1.00 atm pressure.
Write the electronic configuration in sublevels for the following atoms
Four different amino acids can be combined in different sequences to form how many different tetrapeptides?
Describe the bonding in NCl- using a molecular orbital description. Assume the molecular orbital levels are ordered as in N2. What is the NCl- bond order? How any unpaired electrons are present?
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