Smells 2 Molecules in 2-dimensions Structural Formulas.

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Presentation transcript:

Smells 2 Molecules in 2-dimensions Structural Formulas

Predict the smells of these three new molecules. Provide evidence to support your prediction. Vial F: ethyl pentanoate C 7 H 14 O 2 Vial G: butyric acid C 4 H 8 O 2 Vial H: ethyl acetate C 4 H 8 O 2

How can molecules with the same molecular formula be different? Even though the molecules in vials G and H have identical molecular formulas, they have different smells and therefore must be different somehow. A structural formula is a two-dimensional drawing of a molecule showing how the atoms in a molecule are connected.

VOCAB Structural formula: A drawing that shows how the atoms in a molecule are connected. Each line represents a covalent bond. Isomers: Molecules with the same molecular formula but different structural formulas.

Examples:

Wrap Up How can molecules with the same molecular formula be different? Structural formulas show how the atoms in a molecule are connected. A molecular formula can be associated with more than one structural formula. Isomers are molecules with identical molecular formulas but different structural formulas. The smell of a molecule is a property that appears to be related to its structure.

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