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What is the pH of a 0.31 M solution of arsenic acid, H3AsO4? In this solution, what are the concentrations of H2AsO4- and HAsO42-?
a dissolve 8g of ammonium iron iisulfate in 25cm3 of water that has been acidified with 1cm3 of 2m sylfuric acid.add
A mixture containing 80.0 nM iodoacetone (designated A) and 64.0 nM p-dichlorobenzene (designated B) gave the relative detector response (peak area of A)/(peak area of B) = 0.71 in a chromatography experiment.
A 4.50 g sample of LiCl at 25 degrees Celsius dissolves in 25.0 mL of water also at 25.0 degrees Celsius. The final equilibrium temperature of the resulting solution is 60.8 degrees Celsius. What is the enthalpy of solution, delta H solution, of L..
A 6.20 g sample of phosphorus was reacted with oxygen to form an oxide with a mass of 14.20 g. Calculate the percent composition of the compound.
how many grams of KO2 are needed to produce 885.0 L of O2 at 22.0 degrees Celsius and 1.00 atm
Draw a circuit diagram that subtracts two inputs signals and then amplifies the subtracted signal
Specific compounds are named in the boxes below and the functional group part of the name is in boldface. For each boldface functional group, draw an expanded structural formula.
What is the pH of a solution made by mixing 100.00 mL of .20 M HCl with 50.0 mL of .10 M HCl. Assume that the volumes are additive
Aldol condensation: why must aldehyde contain none of corresponding acid? In the aldol condensation with benzaldehyde + acetone (NaOH, ethanol) --> dibenzalacetone
What determines whether 2-bromobutane undergoes an SN1 or an SN2 reaction? How would you favor SN2 formation
Find the absolute pressure [kPa] if the gage pressure is 30 psig when the barometer reads 698 mm Hg.
It takes 16.6 min for a 10.0-mL sample of an unknown gas to effuse through a pinhole. A 10.0-mL sample of helium, He, required 5.00 min. What is the molecular weight of the unknown gas
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