Concentration to drop to of its initial value
A certain first-order reaction has a rate constant of 8.80×10-3. How long will it take for the reactant concentration to drop to of its initial value?
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What mass of hydrogen peroxide should result when 1.29 g of barium peroxide is treated with 25.0 mL of hydrochloric acid solution containing 0.0281 g of HCl per mL?
Tiny water drops in the air disperse the white light of the sun into a rainbow. What is the energy of a photon from the violet photon of the rainbow if it has a frequency of 7.23 times 10 to the sixth seconds.
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How many possible trisubstituted derivatives c6h3x2y can be obtained from the meta disubstituted benzene c6h4x2? (ignore directive effects of the substituents x and assume that all positions on the ring are accessible to the reagent y+).
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