091008

# 091008 - mass of 60.10 g/mol Find its molecular formula...

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Percent Composition in a Compound y The percent by mass of each element in the compound y CFC’s were used as refrigerants and industrial solvents and are blamed for the destruction of the ozone layer. CCl 2 F 2 is the general formula for chlorofluorocarbon, or CFC. Determine the mass percent of each element in CFC

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Empirical vs Molecular Formula
Determining Empirical Formula y Ibuprofen, an aspirin substitute, has the following mass percent composition: C 75.69%, H 8.80% and O 15.51%. What is the empirical formula of ibuprofen?

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Determining Molecular Formula y A compound with the percent composition shown below has a molar mass of 60.10 g/mol. Find its molecular formula with a percent composition C 39.97%, H 13.41% and the rest N.
Alternate Solution y A compound with the percent composition shown below has a molar

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Unformatted text preview: mass of 60.10 g/mol. Find its molecular formula with a percent composition C 39.97%, H 13.41% and the rest N. Combustion Reactions Determining Molecular Formula from Combustion y Combustion of a hydrocarbon produced 33.01 g CO 2 and 13.51 g H 2 O. Calculate the empirical formula. If the molar mass of the compound is 140.27 g/mol, what is the molecular formula of the compound? Summary of Process for Determining Molecular Formulas y Find the mass of each element present y Change mass to moles y Find the mole ratio y Change to a whole number ratio for the empirical formula y Use the molar mass and the empirical formula mass to determine the number of empirical formula units in the molecule...
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091008 - mass of 60.10 g/mol Find its molecular formula...

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