4a
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Hydrocarbon
A substance that contains hydrogen and carbon ONLY.
Empirical Formula
The simplest ratio of atoms in a compound: NaCl, Al2O3…
Molecular Formula
The actual number of atoms in a molecule: H2O…
Structural Formula
The arrangement of atoms in a molecule (doesn’t show all the bonds)
Displayed Formula
Shows all the bonds and the arrangement of atoms
General Formula
The trend/ratio of atoms in a homologous series
Homologous series
A group of chemical with: -The same general formula (only differing by the number of CH2 units) -Show a trend in physical properties -Similar chemical reactions
Functional Group
Parts of an organic molecule that determines its reactions
Isomer
Molecule that has the same molucular formula but different structure
Compound prefixes
• Meth- • Eth- • Prop- • But- • Pent- • Hex-
Substitution
A hydrogen atom is replaced with another atom. UV light is needed to break the bond.
Complete combustion
Hydrocarbon + Oxygen –> Carbon Dioxide + Water
Incomplete Combustion
Hydrocarbon + Oxygen –> Carbon Monoxide + Water or Hydrocarbon + Oxygen –> Carbon + Water
Addition
More atoms can be added because the compuound in unsaturated (contains a double bond). Alkenes can undergo addition because they are unsaturated compounds.