Chem Review - Chemistry Review Quantitative Chemistry...

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Chemistry Review
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Quantitative Chemistry Empirical formula- gives the ratio of atoms of different elements in a compound. It’s the simplest molecular ratio. – Ex: sugar= CH 2 0 Molecular formula– shows the actual # of atoms of each element present in a molecule. – Ex: sugar= C 6 H 12 0 6
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States of Matter Solids- particles are packed in closely together, have a fixed shape. Liquids- particles are relatively close to each other, can change shape but not volume. Titrations- used to find the concentration of other solutions. Solids- Particles move freely and occupy all the space available, have no shape or volume. Follow the gas laws- pressure, volume, temperature P 1 V 1 = P 2 V 2 T 1 T 2
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Atomic Structure Atoms consist of protons (+1), electrons (-1), and neutrons (0). Important numbers- Atomic #- # of protons Mass #- total number of protons and neutrons Molar mass- mass in g of 1 mole of an element Isotopes- atoms that have the same # of protons, but different # of neutrons/ atoms of the same
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This note was uploaded on 10/05/2011 for the course CHEM 1211 taught by Professor Staff during the Spring '09 term at Gainesville State.

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Chem Review - Chemistry Review Quantitative Chemistry...

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