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Name at least three physicochemical properties that make Hexachlorobenzene persistent according to the Stockholm Convention?
The restriction enzyme, SstI, cuts phage DNA at positions 24,472 and 25,877. Draw a picture of the gel you will see if it is used as the mystery enzyme.
What is the empirical formula of the xenon fluoride in the original sample? (Note: Xenon fluorides contain only one xenon atom per molecule.)
The flue gas analysis. The few gas analysis shows as carbon dioxide 14%, carbon monoxide 0.4%, oxygen 5.6% and nitrogen 80%. The air used has a dew point of 50°F. The barometer shows 29.9 inches of mercury. Calculate the dew point of the stack gas..
Calculate the mass in grams of 4.46×10^24 molecules of propylamine. The chemical formula for propylamine is C3H9N.
How do you determine what pH range a certain solution would be a good buffer in?
A beaker with 170 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70 mL of a 0.370 M HCl solution to the beaker. How much will the p..
mr. t. rains was given a 50.0 ml sample of 0.150 m solution ofhcooh. using a buret he transferred 25.0 ml of the weak
Window glass is typically made by mixing soda ash (Na2CO3), limestone (CaCO3), and silica sand (SiO2) and then heating to 1500 degrees Celcius to drive off Co2 from the Na2CO3 and CaCO3
An aqueous solution contains 167 g CuSO4 in 820 mL of solution. Calculate the : a. Molarity b. Percent by mass c. Mole fraction d. Molality of the solution, The density of the solution is 1.195 g/mL
100.g of ice at 0C are added to 300.g of water at 25°C. Is it sufficient ice to lower the temperature of system to 0°C and still have ice remaining
Compute the heat of vaporization of methanol using the normal boiling point of 64.6 'C. Explain the vapor pressure of methanol at 25.0 'C is 0.188 atm.
To cool a volume of water from 176° K to 100° K, 7.9 x 104 J of heat energy must be removed. What is the volume of water that was cooled?
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