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An empty 5.00- flask is charged with 0.450g of pure H2S(g) , at 25 degrees celsius What is the initial pressure of H2S(g) in the flask?
Write the step-wise acid-base reaction of the amino acid proline starting from its fully deprotonated form. Write the correct equilibrium constant expression for each reaction and indicate its numerical value
What observed rotation is expected when a 1.02 M solution of (R)-2-butanol is mixed with an equal volume of a 0.510 M solution of racemic 2-butanol, and the resulting solution is analyzed
Water is added to 25.0 mL of a 0.776 M KNO3 solution until the volume of the solution is exactly 500 mL. What is the concentration of the final solution.
HCL is a significant component of gastric juice. what is the concentration of chloride ion in gastric juice at pH=1.27?
Discuss the two main mechanisms in nucleophilic substitution reactions. Provide examples, show reaction diagrams, discuss controls of reaction rates, stereochemistry
sample of an unknown was dissolved in 10.7 g acetic acid. If the freezing point depression of the solution was 4.14°C, find the molar mass of the unknown
Put in order the following molecules in terms of the Permeability of the molecule across a membrane by simple diffusion at pH 7.
A local radio station can be tuned in by dialing your radio to a frequency of 101.5 MHz. Calculate the wavelength. (Hint: MHz means 1 x 106 Hz.)
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.60 mL of a 0.330 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
The latent heat of vaporization of water is 577 J/kg. If a person's body needs to lose 345 J of energy through sweating, how many kilograms of water in the form of sweat must be evaporated.
If you wanted to make a 3 liter solution of 500 mM formic acid buffer at pH 3.9 how many grams each of sodium formate (MW=68g/mol) and formic acid (MW=46g/mol) would you add
When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 2.33 g of copper was heated with excess sulfur to yield 1.76 g of copper(I) sulfide. What is the percent yield
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