Transcription of Chapter 3: Stoichiometry - lmtsd.org
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Chapter 3: Stoichiometry - lmtsd.org
Chapter 3 10, 2015 Oct 6 2:25 AMChapter 3: StoichiometryOct 6 2:25 AMThe Meaning of the WordThe word Stoichiometry derives from two Greek words: stoicheion (meaning "element") and metron (meaning "measure"). Stoichiometry deals with calculations about the masses (sometimes volumes) of reactants and products involved in a chemical reaction. It is a very mathematical part of chemistry, so be prepared for lots of calculator is Stoichiometry ? Chapter 3 10, 2015 Oct 3 3:44 Counting by Weighing Solve problems related to determining the number of atoms you have based on total mass and average can be counted by Atomic Mass Calculate average atomic masses from isotope data Calculate relative isotope abundance from pertinent mass spectral Spectrometer. 12C is assigned a mass of exactly 12 atomic mass units(amu), and the masses of all other atoms are given relative to this 6 2:31 AMExample ACalculation of Average Atomic Masses from Isotopic sample of metal "M" is vaporized and injected into a mass spectrometer.
Chapter 3 Stoichiometry.notebook 3 September 10, 2015 Oct 63:14 AM The element indium exists naturally as two isotopes. 113In has a mass of 112.9043 amu, and 115In has a mass of 114.9041 amu. The average atomic mass of indium is 114.82 amu.
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