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What are some differences and similiarities in the type of inhibition caused by heat, acid or base, and heavy metal ions on enzyme activity?
calculate the molality of this solution (in mol solute/kg solvent).
When o.514 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.8 to 29.4 degree Celcius. Find delta energy reaction for the combustion of biphenyl in KJ/mol biphenyl.
Why do you think that being exposed to air can have an effect on the amount of vitamin C present in the sample of juice?
A system conducts 238 cal of heat to the surroundings while delivering 331 cal of work. what is the change in internal energy of the system (in cal).
You titrated 1.740g of a solid unknown acid that wasdissolved in 100.0 mL of distilled water; the initial pH value was 2.5. You found that pH= pKa =4.2 when 12.50 mL of NaOH had been added. The concentration of the sodium hydroxide was 0.500M. Cal..
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 unknown solution.
When filling a cuvette with distilled water and measuring it with a spectrofluorometer, upon excitation at 350nm, a band around 397nm appears. This is either a fluorescence band or a Raman band. Suggest what you can do experimentally to identify w..
According to the following reaction, how many grams of carbon tetrachloride are required for the complete reaction of 21.1 grams of methane (CH4)?
A solution of ammonia and water contains 1.30×10^25 water molecules and 7.70×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
Calculate the mass of gasoline (in kg) needed to fill up a small tank which has a capacity of 3.0 L. Assume that the density of gasoline is 0.80 g/mL
What are the origins of these signals? Why does the spectrum contain two other signals of roughly equal height? What are the origins of these signals
If one reacts a double bond with bromine in chloroform a dibromide is obtained. However, if one reacts bromine in water with a double bond, a vicinal halohydrin is formed. Provide an explanation for this result and show a mechanism for the reactio..
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