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Using henderson hasselbalch calculate the ph of .5 L of 2.0M solution of nitrous acid, HNO2 that also contains 140g of nano2 (MM=70g/mol)
The rate constant of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 295 K and 305 K. What must the activation energy be for the rate constant to double as described?
what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25'C.
Vitamin C is helpful in the absorption of what mineral (metal) when the two are present in the gut simultaneously?
how much dry solute would you take to prepare each of the following soluions from the dry solute and the solvent? Part A. 124ml of 0.555M KCl. Part B 10g of .530m KCl. Part C 107g of 5.4% KCl solution by mass.
A titanium rod of length 10 cm and circular diameter of 2 cm is pulled in tension with a load of 100000 N. The rod elongates by 0.01 cm under the load but recovers to its original length when the load is released.
A Cu/Cu2+ concentration cell has a voltage of 0.24 V at 25 Celcius. The concentration of Cu2+ in one of the half cells is 1.5 * 10-3 M. what is the concentration of Cu2+ in the other half cell?
write equations that show a plausible reaction mechanism for the acid-catalyzed isomerization of maleic acid
What is the pH at the stoichiometric point? What is the pH when 105% of the base required to reach the stoichiometric point has been added?
What are some of the considerations for the optimal chain length in glycogen? a) Optimal chain length is a compromise between number of available ends, and the need for debranching enzyme
Propose a method to synthesize (2R,3R) 2,3-epoxyhexan-1-ol using ethanol,methanol,co and CN- as carbon sources
If ocean consisted of 3.5% salt by mass,what would be the freezing point of the ocean? Assume the Density of H2O= 1.00g/ml and that the whole ocean would freeze at the same temperature everywhere.
Determine the mass in grams of Ni in the original sample? Determine the weight percent of Ni in the sample?
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