Chemistry, 23.07.2019 05:20 andrew412603
How can one increase the rate of a chemical reaction? a. decrease the concentration of the reactants. b. add a catalyst. c. increase the activation energy needed. d. increase the entropy of the reactants. e. cool the reactants.
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List four observations that indicate that a chemical reaction may be taking place
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Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
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If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?
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Use the de broglie's wave equation to find the wavelength of an electron moving at 4.5 × 106 m/s. show your work. note: h= plank's constant (6.62607 x 10-34 j s)
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