Tag Archives: MCAT

Switch Hitter

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Which one of the following molecule is amphipathic, with both a hydrophilic and hydrophobic region?

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Buffer Buffoon

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A student creates a 1M citrate (C3H5O(COO)33-) buffer solution at pH 5.0. He then dilutes the solution to 200 mM, and adds it to his experiment. What is the pH of the 200 mM buffer solution?

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Reagents & Transformations

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Which reagents would carry out the following transformation?

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Layer of the Epidermis

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Which layer of the epidermis is the characterized by a low rate of mitosis and a high concentration of keratin?

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Hexan-1-ol to Hexanal

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Which reagent would you choose to convert hexan-1-ol to hexanal?

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The pH Value Is Right

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Which set of 1 Molar solutions has the correct pH values?

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Mass of the Gas

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The density of an unknown gas under STP conditions is 3.17 g.L-1. What is the molecular mass of the gas?

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Getting Torqued

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Water moves through a turbine in a dam, causing it to turn. The force of the water is 300 N, and the radius of the wheel is 20 m. What is the torque around the center of the wheel?

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Recrystallization and You

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Which statement below about recrystallization is NOT correct?

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Phase Changes

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Which opposite Phase Changes occur at the same temperature for a pure substance?

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