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A reaction rate increases by a factor of 1000. in the presence of a catalyst at 25 C. The activation energy of the original pathway is 98 kJ mol-1. What is the activation energy of the new pathway, all other factors being equal? In practice, the new pathway also has a different pre-exponential factor.
the ejected electrons have the speed v=1.06x10^6 m/s. What will be the speed of the electrons ejected from the same metal by a light of wavelength 180nm?
HC9H7O4(aq) + H2O(l) image from custom entry toolH3O(aq) + C9H7O4(aq) Two aspirin tablets, each containing .325 g aspirin(along with a nonreactive "binder" to hold the tablet together), are dissolved in 200.0 mL of water. Calculate the pH of the ..
An aqueous solution that contains 285ppm of potassium nitrate (KNO3) is being used to feed plants in a garden. What volume of this solution is needed to prepare 1.7 L of a solution that is 97 ppm in KNO3?
The solubility of lead (II) sulfate is 4.0x10^-2 g/L. What is the solubility product constant for lead (II) sulfate?
The decomposition of dimethyl ether (CH3OCH3) to methane, carbon monoxide, and hydrogen gases is found to be first-order.
Draw the structure for aspartic acid-serine-histidine at pH 7. Why is this structure have peptide bonds that are flat and planar?
High levels of ozone (O3) make rubber deteriorate, green plants turn brown, and cause people to have difficulty breathing. Calculate delta G at 298 K for the formation of 1 mole of O3 from O2 in urban smog, where [O2]=0.210 atm and[O3]=5.00x10^-7 ..
What will the partition function of this system reduce to at very low temp ( when kbt > delta e)?
neutral compound show traces of an acid as an impurity wheras the acid might not show any traces of a neutral compound?
A hydrocarbon is burned in an excess of oxygen to give 1.32g of carbon dioxide and 0.72g of water. What is the empirical formula of hydrocarbon
consider a 0.0500m HClO2 is a moderately weak electrolyte acid such that 36% of the molecules dissociate when dissolved in water. calculate the van't hoff factor
What must be the initial concentration of reaction, [A]0, if (a) the zero- and first-order; (b) the zero- and second-order; (c) the first- and second-order reactions are to have the same half-life?
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