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You are asked to prepare 1.9 L of a HCN/NaCN buffer that has a pH of 9.56 and an osmotic pressure of 1.00 atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? (Assume complete dissociation of NaCN).
Methyl salicylate, C8H8O3, the adorous constituent of oil of wintergreen, has a vapor pressure of 1.00 torr at 54.3 degrees celsius and 10.0 torr at 95.3 degrees celcius. What is it's vapor pressure at 25 degrees celcius?
In an industrial preparation of silicon, 155.3kg of SiO2 of is allowed to react with 79.3kg of carbon to produce 66.2kg of silicon. What is the theoretical yield for the reaction in Kg Si
a sample of gas in a cylinder as in the example in part a has an initial volume of 40.0 l and you have determined that
What is the morality of an unknown sulfuric acid solution if it takes 23.35 mL of a 0.3335 M lithium hydroxide solution to neutralize it?
Two moles of sucrose are dissolved in eight moles of water. Assume that the solution follows Raoult's Law, but that the vapor pressure of sucrose is negligible, as it is for most solids. The distillation is carried out at 1 atm.
How many moles of excess base are present? How many additional mL of 0.100 M HCl would be required to neutralize the solution?
A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption
What should be the final volume of a solution containing 50.5g of solid KMnO4 be in order to prepare a 0.745 M solution
Adenine is a purine base that is a component of several important molecules, including adenosine triphosphate (ATP), flavin adenine dinucleotide (FAD), DNA, and RNA. Draw adenine.
The extract was filtered and placed in a 50.00ml volumetric flask which was filled to the mark. 5.00ml of the solution was transferred to a second 50.00ml volumetric flask. The diluted solution from the second volumetric flask was found to contain..
Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 85.0 pm
During a servere episode of air pollution, the concentration of lead in the air was observed to be 3.01*10^-6g Pb/m^3. How many Pb atoms would be present in a 0.500 L sample of this air
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