A sample of aspirin (acetysalicylic acid) used as a "pain killer" contains the benzene ring and has a molecular weight of 180. On analysis, it was found to contain 60% carbon, 4.4% hydrogen and 35.6% oxygen (RAM: C= 12, O=16, H=1)  Determine the empirical formula of aspirin What is the molecular formula of aspirin? State the technique that can be used determine the molecular weight of aspirin.

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".