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1. A polyester fleece sweater in a clothes dryer will acquire a static charge in the hot, dry environment of the dryer. When you reach into the dryer to get the garment, it is common to feel the hairs on your arms standing up. It would not be unusual to take a fleece sweater out of the dryer and find a sock stuck to it. There may be a crackling noise when the sock is pulled off. Explain these effects.
2. What does the voltage of a battery measure? Why would high voltage batteries be neccessary in some situations?
3. What is a short circuit? Why is a short circuit dangerous?
The solubility of a slaked lime, Ca(OH)2, in water is .185g/100mL. What volume of .00400 M HCl is needed to neutralize 10.0mL of a saturated Ca(OH)2 solution
If one pipet volume of each of the following pipets (2, 5, 10 mL) of a 2.56x10-1 M sample are added to a 25 mL volumetric flask and it is filled to the line with water and well mixed, what is the concentration of the resulting solution?
Give the general Henderson-Hasselbalch equation and sketch the plot it describes (pH against amount of NaOH added to a weak acid). On your curve label the pKa for the weak acid, and indicate the region in which the buffering capacity of the system..
The resolution for two compounds in a chromatogram was measured to be R = 0.928. The retention times for each compounds compound are
Using the weak acid that you were assigned in this experiment and .100M NaOh, describe exactly (show calculations) how you would prepare 100.0mL of a buffer at pH = 5.50
Write a balanced equation for the reaction of NaCH3COO and HCl. Express your answer as a chemical equation. Identify all of the phases in your answer. Enter no reaction if no precipitate is formed.
A sample of chlorine gas occupies 825 mL at 1250 torr. What volume will the chlorine occupy at 3.50 atm
The rate constant of a reaction is 6.2 x 10^-3s-1 at 25 degrees C, and the activation energy is 33.6 KJ/mol.. What is k at 75 degrees C?Enter your answer in scientific notation.
The Ka of acetic acid is 1.8 x 10^-5. Calculate the pH of a solution that is composed of 1.0 M CH3CO2H and 0.50 M NaCH3CO2. Can someone please help
A voltaic cell is constructed by immersing a strip of silver metal in a 1.0 M AgNO3 solution and a strip of lean in 1.0 M Pb(NO3)2 solution. A wire and salt bridge complete the cell. What is the potential for the cell
Given the Ksp values for the following precipitates, please predict which precipitate has the largest solubility in the presence of 0.01 M of its composing anions (e.g., in the presence of 0.01 M Cl- ion for AgCl(s))
calculate the number of water molecules that can be prepared from 664 h2 molecules and 664 o2
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