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A mixture of helium and neon gases at 237 K contains three times the number of helium atoms as neon atoms. The concentration (n/V) of the mixture is found to be 0.150 mol/L. Assuming ideal behavior, what is the partial pressure of helium?
Critically evaluate the procedure used in this experiment as a quantitative technique for the analysis of copper (II) ion. Suggest sources of errors and ways of minimizing the error
What is the mass (by difference) of a sample if the initial mass of the sample in the bottle was 27.68-g and the final mass of the bottle and sample was 23.63-g?
What can you conclude from these results? -- Need 4 of them because I'm lost. Also, how can I estimate the useful range of a pH meter?
You are studying an enzyme that has a catalytic efficiency of 7x10^7M-1s-1. Knowing that the Km=2.50µM and how much enzyme did you use to obtain a maximum velocity of 2520 µM/min
The delta G inital for the dissociation of an aqueous solution of a weak acid at 25 degrees celcius is 14.8 kJ. What is the calue of Ka for the acid?
Compute the pH at the temperature of 25 0C of a solution prepared by mixing 50 mL of 1.60 M sodium hydroxide solution to 0.5 of .0850 M Furoic acid HC 5 H 3 O 3 .
Which of the following substances form molecular crystals in solid form?
A 25.35g piece of iron and a 27.40g piece of gold at 100C were dropped into 920ml of water at 19.45C. The molar heat capacities of iron and gold are 25.19 J/(mol C) and 25.41 J/(mol C). What is the final temperature of the water and pieces of meta..
Aqueous solutions of sodium thiosulfate, Na2SO3, are used as an antidote to some snakebites. How many moles of sodium ions are found in 10.0 mL of a 0.15 M solution of Na2S2O3?
Calibration and collection of equilibrium data are different experiment. Why could you use the calibration curve for getting equilibrium data?
A .692 L NaCl solution is diluted to a volume of 1.25 L and a concentration of 4.00 M. What was the initial concentration?
Based on their activation energies and energy changes and assuming that all collision factors are the same, which of the following reactions would be slowest in the reverse direction
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