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Obsidian is the material out of which the Olmec fashioned tools.
Lewis Structure
A visual representation that shows the valence electrons of atoms within a molecule, helping to predict the arrangement of atoms, bond formation, and molecular shape.
Ethane
A colorless, odorless gas with the formula C2H6, used as a fuel and as a feedstock for the production of chemicals.
Octane
A hydrocarbon with the chemical formula C8H18, commonly used as a reference standard in determining the quality of gasoline fuels.
Propane
A flammable hydrocarbon gas that is a component of natural gas, commonly used as fuel.
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