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Substrates and reactive groups in an enzyme's active site must be precisely aligned in order for a productive reaction to occur. Why, then, is some conformational flexibility also a requirement for catalysis
What is the theoretical yield of aspirin if 153 kg of salicylic acid is allowed to react with 179 kg of acetic anhydride?
Why are the mobile phases added in order of increasing polarity rather than in the order of decreasing polarity?
A metal forms the fluoride MF2. Electrolysis of the molten fluoride by a current of 3.86 A for 16.2 minutes deposits 1.07 (backwards "g") of the metal.
Use the van der Waals equation of state to calculate the pressure of 3.20 mol of Xe at 481 K in a 5.80-L vessel.
How many grams of Cuso4 are needed to prepare a .150 molal solution in 300 grams of water?
a solution consisting of isobutyl bromide and isobutyl chloride is found to have a refractive index of 1.3931 at 20 degrees celsius. The refractive indices at 20 degrees celsius of isobutyl bromide and isobutyl chloride are 1.4368 and 1.3785
When a metal was exposed to light at a frequency of 4.54× 10^15 s-1, electrons were emitted with a kinetic energy of 3.10 × 10^-19 J.
Talc (used in talcum powder) has mass composition 19.2% Mg, 29.6% Si, 42.2% O,and 9.0% H.What is the empirical formula of the compound?
Calculate the entropy of fusion of a compound at 20 oC given that enthalpy of fusion is 45 kJ/mol at its melting point of 162 oC and Cp of liquid
It takes 50.0J to raise the temperature of an 12.0g piece of unknown metal from 13.0 C to 24.0 C. What is the specific heat for the metal?
Gasohol contains ethanol (C2H5OH) which when burned reacts with oxygen to produce CO2 (g) and H2O(g). How much heat is produced when 12.5 grams of ethanol burns.
A 24-kg child receives 2.85x10^6 B particles, each with an energy of 4.30x10^-13 J. If the RBE=0.40, how many millirem did the child receive?
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