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You are asked to prepare 1.6 L of a HCN/NaCN buffer that has a pH of 9.88 and an osmotic pressure of 1.73 atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? (Assume complete dissociation of NaCN.)
how do you find the mass of one mole of spilt pea using the mass of .069 nd Avoadro's number (6.02x1023rd).
The procedure calls for the addition of 7-8 drops of aqueous NaOH. What is the purpose of the base here? Be specific and show the reaction that occurs
Cobalt-60 is a beta emitter with a half life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 12.0 years?
4 HCl(aq) + MnO2(s)-> MnCl2(aq) + 2 H2O(g) + Cl2(g) Consider the reaction of 1.53 mol HCl with excess MnO2. How many moles of Cl2 form?
What is the maximum body accumulation of methylmercury at a constant ingestion rate of 4 mg of mercury per day?
How many kilojoules of energy are required to heat 50.0 g of ethanol from -20.0°C to 68.0°C?
What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? T = 25.0°C
A reaction has a rate constant of 1.27×10?4 /s at 28 degrees C and 0.226 /s at 78 degrees C. Determine Activation Barrier. What is the value of the rate constant at 16 degrees C?
Calculate the concentration of a red dye solution with an absorbance of 0.617. If you have 5.78ml of the solution how many mg of red dye are found in the solution.
what mass of water is required to dissolved in 175g KNO3 to produce a 2.25 m solution?
a 5.00 mL sample of isopropyl alcohol has a mass of 3.930 g when measured at 20 degrees Celsius? what is the specific gravity of isopropyle alcohol?
Rank the diffusion coefficients from least (1) to greatest (4) for the following cases. Assume the temperature is the same for all cases. 1-4 Interdiffusion C in gamma-Fe
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