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Suppose 0.380 kg of water initially at 45.0°C is poured into a 0.300 kg glass beaker having a temperature of 25.0°C. A 0.500 kg block of aluminum at 37.0°C is placed in the water, and the system insulated. Calculate the final equilibrium temperature of the system.
The element helium is thouhght to remain a liquid at absolute zero. (Solid helium can be made only by exerting a pressure of about 26 atm on a liquid sample.) Is the entropy of liquid helium at absolute zero exactly zero. Why or why not
A gaseous mixture containing 0.200 mol fraction of carbon tetrachloride (CCl4) and 0.800 mol fraction of dry air is initially at 68.0°C and 1169 mmHg. 1- If this mixture is cooled at a constant pressure, at what temperature does the CCl4 first sta..
what is the percent ionization of a solution made by adding 6.00 grams of ch3cooh to 100 g of water kb 0.512 ? cm if
protonated benzoic acid in solution give the Henderson-Hassalbach equation and calculate pH
You add more A to the flask. How does the concentration of each chemical compare to its original concentration after equilibrium is reestablished
A chemical process is designed to produce ethylene from ethane according to the reaction: C2H6 (ethane) ? C2H4 (ethylene) + H2 The fresh feed to the process contains pure ethane at a flowrate of 100 mole/min. The fresh feed is mixed with a recycl..
how glycine buffers solutions at either pKa by consuming small amounts of added hydrogen or hydroxide ions
Ascorbic acid (Vitamin C, present in apples) is burned in the presence of excess oxygen, to yield 5.80 mg CO2 and 1.58 mg H2O. Knowing that ascorbic acid contains only C, H, and O, and the mass of the sample used in the combustion was 3.87 mg
Draw a Kekule diagram for benzene - why is this representation of benzene not considered to be as good as drawing a hexagon with a circle in the centre? What does the circle represent?
A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature.
Solution is prepared by mixing 0.025 l of 3e-3 m BaCl2 and 0.025l of 2e-3 m of na2co3. Ksp= 2.6e-9 for baco3. Write balanced equation with correct state
What range of magnetic field strength would be required to cover the mass range between 16 and 625, for singly charged ions, if the accelerating voltage is held constant?
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