Chapter8.pdf - CHEMISTRY - BURDGE-ATOMS FIRST 3E CH.8 -...

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CHEMISTRY - BURDGE-ATOMS FIRST 3ECH.8 - CHEMICAL REACTIONS
CONCEPT:EMPIRICAL FORMULAThe empirical formula is also known as the__________________________.It represents the_______________________________ratio of molesof each element in the compound.The molecular formula is also known as the__________________________.It represents the_______________________________ratio of moles of each element in the compound.EXAMPLE:What is the empirical formula of dimethylhydrazine, C2H8N2, a colorless liquid used as a rocket fuel?EXAMPLE: Elemental analysis of a sample of an ionic compound showed 2.82 g of Na, 4.35 g of Cl, and 7.83 g of O. Whatis the empirical formula and name of the compound?EXAMPLE: After a workout session, lactic acid (M= 90.08 g/mol) forms in muscle tissue and is responsible for musclesoreness. Elemental analysis shows that this compound contains 40% C, 6.7% H and 53.3% O. Determine the molecularformula.C6H12O6=CHEMISTRY - BURDGE-ATOMS FIRST 3ECH.8 - CHEMICAL REACTIONSPage 2
CONCEPT:COMBUSTION ANALYSISUnder a combustion reaction a compound made of_______________or_______________reacts with______________ .The products formed will be________________and________________.EXAMPLE:A 0.2500 g sample contains carbon, hydrogen and oxygen and undergoes complete combustion to produce0.3664 g of CO2and 0.1500 g of H2O. What is the empirical formula of the compound?CHEMISTRY - BURDGE-ATOMS FIRST 3ECH.8 - CHEMICAL REACTIONSPage 3
CONCEPT:CHEMICAL COMPOSITION

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Term
Fall
Professor
Hulet
Tags
Chemistry, Stoichiometry, Chemical reaction

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