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It is estimated that about 0.02 m3 of pyrite (density 5 g/cm3) has "disappeared" from a rock face that is adjacent to a lake (original pH=6.7) with dimensions 100 m x 40 m x 10 m. You think that the "disappearance" is due to leaching of the pyrite into the lake. To prove your point, what would the new pH of the lake have to be
The freezing point of pure benzene is 5.5 Celsius and its freezing point constant is 5.12 C/m. Calculate the molecular weight of the unknown.
calculate the heat energy released when 15.1g of liquid mercury at 25 degrees C is converted to solid mercury at its melting point
What chemical test might be used to distinguidh between pentanal and 2-pentanone? Between benzyl alcohol
Will the boiling point of a solution of 10 g of NaCl (which has no appreciable vapor pressure at 100 oC) in 100 mL of water be higher than, lower than
Calculate the concentrations of all species in a 1.62 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
How much limestone would be required each year in order to remove sulfur dioxide from a power plant whole daily consumption of coal
In an experiment, at this temperature, 1.10 mol of H2 and 1.10 mol of F2 are introduced into a 1.08-L flask and allowed to react. At equilibrium, all species remain in the gas phase.
A buffer solutions contains .120 M acetic acid and 0.150 M sodium acetate. How many moles of acetic acid and of sodium acetate are present in 50.0 ml of solution ? = 0.0075 moles.
When DMPT is treated with base, and then added to a solution of [PtCl2(K^2- dppe)], compound A forms and has the formula [PtCl(DMPT)(K^2- dppe)].
The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-fourth of the original. What is the final volume of the gas?
A 15 mL sample of a solution of Pb(ClO3)2 was diluted with water to 19 mL. A 15 mL sample of the dilute solution was found to contain 0.027 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution.
Determine what the mothballs were made of. Pure ethyl alcohol has a boiling point of 78.41 degrees C and Kb = 1.22 deg C/m for this solvent.
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