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This Concept Map, created with IHMC CmapTools, has information related to: Apologia, ed 1, Module 6 Concept Map, moles related through the ratio in the moles, g (grams) gives amu, Empirical Formula is the relative number of moles of elements in a compound using the smallest whole numbers, Round the quotient to the closest integer that would be the red n -->, g (grams) in amu, Molecular Formula is the actual number of atoms of each element making up a molecule, Module 6: Stoichiometry covers Everything Comes Back, Empirical Formula how to determine it Determine the percent composition of each element, Normalize the subscripts by dividing through by the smallest number of moles then Round up the fractional to whole numbers, Everything Comes Back to moles, Round the quotient to the closest integer then Multiply the rounded whole number by all the subscripts. The result is the new molecular formula, the actual number of atoms of each element making up a molecule is the most exact formula with number of atoms of all of the elements in one molecule, amu to get moles, Module 6: Stoichiometry covers Determination of a formula is the most basic and frequent calculation in chemistry, Determine the molecular mass in grams then Divide the molecular mass of the compound by the molecular mass of the empirical formula, Determine the percent composition of each element then Assume 100 grams of sample which automatically converts percent from the previous step to grams, Set up a formula with the number of moles of each element as subscripts then Normalize the subscripts by dividing through by the smallest number of moles, Divide the molecular mass of the compound by the molecular mass of the empirical formula then Round the quotient to the closest integer, Pre-requisite: empirical formula must be known can be determined decomposition lab, Calculate the moles for each element by dividing its weight from previous step by its atomic weight then Set up a formula with the number of moles of each element as subscripts