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Material Type: Lab; Class: General Chemistry I; Subject: Chemistry; University: Roane State Community College; Term: Unknown 1989;
Typology: Lab Reports
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Stoichiometry Problem Exercise for Chemistry Laboratory Do not hand in this work sheet. When you are ready, you will be given an examination over this material. Complete the examination by yourself and hand it in to receive credit.
A) Calculate the number of moles of CO 2 produced from 0.600 mol C 3 H 7 OH reacting with sufficient O 2. SET-UP
ANS 1.80 mol B) Calculate the number of moles of O 2 reacting with sufficient C 3 H 7 OH required to produce 3.60 mol of H 2 O. SET-UP
ANS 4.05 mol C) Calculate the number of moles of O 2 required to react with 1.80 mol C 3 H 7 OH. SET-UP
ANS 8.10 mol
(^1) Mass % is being discouraged by IUPAC at the moment, with the replacement being mass fraction, w , which is given by the formula: where i is included in the exhaustive j. However, %, which is always mass percent unless otherwise stated, is still very prevalent.
How many grams of KClO 3 must be heated to form 24.6 grams O 2? SET-UP
ANS 62.8 g
Percent purity is defined as mass of pure material (or material of interest) divided by the total mass of material present times 100 %. The equation for this is: .