coursehero.physchemHW1 - Physiological Chem. Lecture...

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Physiological Chem. Lecture Homework Ch.1 1.22 Sulfer Dioxide (SO2) is a compound prouced when sulfer burns in air. It has a melting point of –72.7’C and a boiling point of –10’C. In what state does SO2 exist at room temperature (25’C)? (The symbol ‘C means degrees Celsius.) SOLID 1.26 What is the difference between an element and a compound? A chemical compound can be broken down into simpler Substances, whereas an element cannot because it is already in its simplest state. 1.27 What is the difference between a compound and a mixture? Mixtures can be classified as homogenous or heterogeneous, whereas a compound is always heterogeneous. 1.28 Classify each of the following as an element, a compound, or a mixture: (a)Aluminum foil COMPOUND (b)Table salt MIXTURE (c)Water COMPOUND (d)Air ELEMENT (e)A banana MIXTURE (f)Notebook paper MIXTURE 1.30 Hydrogen Peroxide, often used in solutions to cleanse cuts and scrapes, breaks down to yield water and oxygen: Hydrogen Peroxide ------- Water + Oxygen (a)Reactants : Water, Oxygen
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This note was uploaded on 04/29/2008 for the course CHEM 130 taught by Professor Stieglitz during the Fall '07 term at University of Massachusetts Boston.

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coursehero.physchemHW1 - Physiological Chem. Lecture...

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