CHEM 112 Lecture Notes - Lecture 7: Carran, Reagent, Molecular Mass
13 Oct 2014
School
Department
Course
Professor
Document Summary
Use volume ratio (or %), mixtures of liquids. The amount alcohol in beer is about 5%v/v. Total volume in litres molality = moles of component. Fe2o3 (55. 85 g) (2) + (16. 00g) (3) = 159. 70 g. Mass fe = 55. 85 g 2 = 111. 70 g for 1 mole. 3 (16. 00 g) 100% = 30. 06% 100% - 69. 94% = 30. 06: empirical formula: Lowest whole number ratio of atoms in a compound: molecular formula: shows actual number of atoms in a molecule. Empiricalformula molecular formula water hydrogen peroxide table salt (sodium chloride) ethane. Example: a compound containing only phosphorous and oxygen was found to have the composition shown below. Moles p = mass p molar mass p. Moles o = mass o molar mass o. Composition stoichiometry: one molecule of glucose (c6h12o6) has 6 carbon atoms, one mole of glucose (c6h12o6) has 6 moles of c atoms.
