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If the decay of trihalomethane is first order,and 90% of the trihalomethanes in glass of tap water are gone after 3 hours,what is the decay rate constant?
The vapor pressure of liquid Nickel at 1606° C is 0.100 torr, whereas at 1805° C, its vapor pressure is 1.000 torr. At what temperature does the liquid have a vapor pressure of 2.500 torr
Calculate the amount of heat energy (q) gained or lost when 180g of water is cooled from 65.0*C to 28.5*C. What is the sign of q for this calculation
stable globular units unit of tertiary structure clusters of secondary structure may be distinct functional units of a protein Both: depends on primary structure depends on hydrophobic interactions may retain a 3d structure when seperated from ent..
Some of the cyclohexane solvent vaporized during the temperature versus time measurements. Will this loss of cyclohexane result in the freezing point of the solution being recorded as too high
A 10.00 mL 0.25 M formic acid sample is being titrated with 0.25 M NaOH. What is the pH of the solution after adding 15.00 mL NaOH solution?? Ka=1.8x10-4
Explain how the acid hydrolysis of starch differs from the enzyme catalyzed hydfolysis. Compare products as well as conditions of time and temperature
Assume that you need to prepare 4-methyl-2-pentyne and discover that the only alkynes on hand are acetylene and propyne. You also have available methyl iodide, isopropyl bromide,
What is the density of the gas from the previous example if it contains 90% methane 10 % ethane under bottom hole condition (assume T=150 degrees F)
A solution of ethanol (C2H5OH) in water is prepared by dissolving 63.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution.
given the equation 2C2H6(g)+7O2(g)->4CO2(g)+6H20(g) How many grams of oxygen are needed to react with 4.00 moles of C2H6?
Not all Friedel-Crafts reacts require a strong Lewis acid catalysts to generate the electrophile for the substitution reaction. Show, using curved arrows, how the electrophile is generated from t-butanol in the presence of H2SO4
calculate the osmotic pressure in mm Hg of 6.00 L of an aqueous 0.889 m solution at 30.°c, if the solute concerned is totally ionized into three ions
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