Which assumption is NOT part of the Kinetic Molecular Theory of gases? A. Gases are made up of molecules in random motion. B. Molecular collisions are perfectly elastic. C. The lighter the gas, the faster is its diffusion D. The average kinetic energy of a gas particle is directly proportional to the temperature in Kelvin

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• Calculate the mole fraction of methyl alcohol, [tex]\mathrm{CH}_{3} \mathrm{OH}[/tex] in a solution of [tex]1.2 \mathrm{~g}[/tex] methyl alcohol dissolved in [tex]16.8 \mathrm{~g}[/tex] water. (molar masses in g/mol- [tex]\mathrm{CH}_{3} \mathrm{OH}-32, \mathrm{H} 2 \mathrm{O}-18[/tex] ) A. 0.04 B. 0.38 C. 0.93 D. 0.96
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• The number of atoms in 25 g Al is (Al is 27 g/mol) A. 0.93 B. 25 C. 1.5 x 1025 D. 5.6 x 1023
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