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By how much must an enzyme reduce the activation energy of a reaction at 37°C in order for the reaction to occur 100 times faster than in the absence of the enzyme?
caffeine is a stimulant found in coffee and tea . a solution of caffeine in chloroform as a solvent has a concentration
When compound A (C5H12O) is treated with HBr, it forms compound B (C5H11Br). The 1H NMR spectrum of Compound A has one singlet (1), two doublets
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid,
Consider a solution formed by mixing 60.0 mL of 0.100 M H2SO4, 30.0 mL 0.100M HOCl, 25.0 mL 0.180M NaOH and 25.0 mL 0.100 M Ba(OH)2. Calculate the pH of this solution
Two types of electrochemical cells which are based on thermodynamic principles can be described. Which of the following statements about these cells is correct
Suppose a piece of silver jewelry contains 6.53×1022 atoms of silver (Ag). How many dozens of silver atoms are in the piece of jewelry. Express your answer numerically in dozens.
A solid substance has a density of 8.7g/cm^3. How many pounds will this substance weigh if you have a block of the substance with a volume of 215.0 cubic feet
What volume of hydrogen gas at STP is required for the complete reaction of 50.0 g of nitrogen in the following reaction? N2(g) + 3 H2(g) ? 2 NH3(g)
The normal boiling point of actone is 56.2 C and the molar heat of vaporization is 32.0 kJ/mol. At what temperature will acetone boil under a pressure
The temperature dependence of the vapor pressure is given by the equation: Ln p = Ln A - deltaH(vapor)/RT. Where p = pressure, T = temperature, A = pre-exponential constant, and delta h (vapor) is the enthalpy of vaporization. Solve for vapor pres..
Regard as an adult who drinks two martinis with lunch. Approximate the blood alcohol concentration in this person after two martinis have been consumed an adult with a blood alcohol concentration of 3.0 X 10 (-3) g/mL or more is considered intoxic..
Write the chemical equation(s), including state symbols, for what happens when each soluble ionic compound that you identified above is placed in water. Are these substances reacting with water when they are added to water?
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