Ethanol has a molecular formula C2H5 A sample of ethanol has a mass of 2.3 grams. The sample was completely burnt in oxygen. How many molecules are present in the sample of ethanol? How many hydrogen atoms are present in the sample of ethanol? Write down a balanced chemical equation for the combustion of ethanol in oxygen. Calculate how many moles of water molecules were produced in the combustion of ethanol in oxygen. Calculate mass of carbon dioxide was produced in the combustion of ethanol in oxygen. Calculate how many oxygen molecules were used up in the combustion of ethanol in oxygen.

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Q: chemical equation.

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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".