Combustion Analysis and %age Composition

Combustion analysis is a standard method of determining a chemical formula of a substance that contains hydrogen and carbon. First, a sample is weighed and then burned in a furnace in the presence of excess oxygen. All of the carbon is converted to carbon dioxide, and the hydrogen is converted to water in this way.
Thus we need to perform these general steps. First, convert from the data given to grams of carbon, hydrogen, and oxygen. Second, determine the empirical formula from the grams of carbon, hydrogen, and oxygen. Third, determine the molecular formula from the empirical formula and the given molecular mass.
Step 1: Identify the mass of carbon dioxide and water produced by the combustion. Step 2: Find how many moles of carbon are in carbon dioxide. Find the molar mass of carbon dioxide. Multiply the mass of carbon dioxide by the reciprocal of its molar mass to find the number of moles of carbon dioxide.
Oxygen, heat, and fuel are frequently referred to as the "fire triangle." Add in the fourth element, the chemical reaction, and you actually have a fire "tetrahedron." The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.

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