Ethanol has a molecular formula C2H5OH. A sample of ethanol has a mass of 2.3 grams. The sample was completely burnt in oxygen. i. How many molecules are present in the sample of ethanol? ii. How many hydrogen atoms are present in the sample of ethanol? iii.  Write down a balanced chemical equation for the combustion of ethanol in oxygen.

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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".