3. A solution containing 4.48 ppm KMnO4 exhibits 85.9 %T in a 1.00-cm cell at 520 nm. Calculate the molar absorptivity of KMnO4 at this wavelength. (molar mass of KMnO4 = 158.03 g/mol) (20%)

2. Assume that the mole fraction of carbon dioxide in the earth' s atmosphere is 0.000306.(a) Estimate the mean free path between intermolecular collisions in the atmosphere at sea level if the temperature is 298 K.b) Estimate the number of collisions with other carbon dioxide molecules per second undergone by a carbon dioxide molecule under the conditions in (a). (20%)

3. A solution containing 4.48 ppm KMnO₄ exhibits 85.9 %T in a 1.00-cm cell at 520 nm. Calculate the molar absorptivity of KMnO₄ at this wavelength. (molar mass of KMnO₄ = 158.03 g/mol) (20%)

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