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At 500 K, PCl5 decomposes rather extensively into PCl3 and Cl2. If 1.000 moles of PCl5 is placed in a 1 liter box at 500 K, 13.9 % of it decomposes into PCl3 and Cl2. Calculate K for PCl5(g) PCl3 +
Calculate K for 2 NO(g) + O2(g) 2 NO2(g) from the observation that when equilibrium is established at 500 K, there are 0.190 moles NO2, 2.65 X 10-4 moles NO, and 0.606 moles O2 in a volume of 0.759
At 1 atm, how much energy is required to heat 63.0 g of H2O(s) at -24.0 °C to H2O(g) at 143.0 °C
start with 4-cyclopentylphenol and react with NaOH, CH3I, NBS, heat show each step to get the final product.
Explain the reason why the six atoms that are involved in the peptide bond share a common geometric plane
The person selling the coin priced it at $200, claiming it was pure gold. Being a well-equipped traveler and a chemist, the professor produced his graduated cylinder and electronic balance. The coin
If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown solution is 0.50 g/mL, what is the approximate concentration of the unkno
How much heat would be given off per mole of NaOH if 4.6g of NaOH dissolves to give off 755J of heat? b)How many grams of NaOH are needed to produce 88 kJ of heat
The native conformation of a protein represents the lowest energy state of the polypeptide. Would you expect it to be always true
How many grams of nitrogen monoxide are produced when copper metal reacts with nitric acid to form water and 5.92 g of copper(II) nitrate in addition to the nitrogen monoxide?
List all the covalent and non-covalent interactions that exist between amino acid residues in a polypeptide (besides the peptide bonds).
A 3.664 g sample of a monoprotic acid was dissolved in water. It took 20.27 mL of a 0.1578 M sodium hydroxide solution to neutralize the acid. Calculate the molar mass of the acid.
A polypeptide is completely hydrolyzed, then reacted with PITC, followed by amino acid chromatography. What information is obtained
For analysis, a short peptide seven residues long is treated with FDNB, followed by complete acid hydrolysis and amino acid chromatography. What are the products of these steps. What kind of informa
Describe the use of light absorbing reagents in amino acid chromatography. What are these reagents used for? Name two reagents that are commonly used and describe how they react with amino acids.
What mass of iron (III) chloride in g is present in 2.50 ml of this solution
The density of silver is 10.5g/cm3 what is the volume im cm 3 of an ingot of silver with mass 0.743 kg. If this sample of silver is a cube how long in each edge in cm
What is the importance of the pI (isoelectric point) of an amino acid, when considering ion exchange chromatography
Describe a common buffer system and elution method in ion exchange chromatography. What are the salt ions in the elution buffer good for
If the initial concentration of HD(g) is 8.433 mol/L, calculate the % of HD(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kc at -173.0 °C i
The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through the evaporation of 1.86 g of sweat
can someone please show me how to draw 2-bromo-3,3-dimethyl-pentane according to Markovnikov's rule
Calculate the average mass of a sphere in this sample. How does the average mass for a sphere in this sample compare with the average mass of the sample that consisted just of the blue spheres? How
What is the strongest base that may exist in water? What happens to stronger bases? (Use methoxide, CH3O1-, as an example.)
Phenol is a common organic compound that may be used as a disinfectant. Its pKa in water is 10.0 while in methanol its pKa = 14.4. Is it a stronger acid in water or methanol? Explain the difference