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Empirical formula is the simplest whole number ratio of atoms of each element present in a
compound

Molecular formula is the actual number of atoms of each element in a molecule

General formula is the simplest algebraic formula for a member of a homologous series e.g.
for an alkene CnH2n…

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Hydrocarbon ­ a compound which only contains carbon and hydrogen

Crude oil ­ a source of hydrocarbons

Fractional Distillation a process in which hydrocarbons of different chain length and boiling
point can be separated

Saturated Hydrocarbon a hydrocarbon which contains no carbon to carbon double bonds

Unsaturated Hydrocarbon ­ a…

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Hess' Law ­ if a reaction can take place by more than one route, and the initial and final
conditions are the same, it doesn't matter which route is taken, the total enthalpy change is
the same for each route

Le Chatelier's principal if a system is in dynamic equilibrium,…

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