CHEM 11H- Final Exam Guide - Comprehensive Notes for the exam ( 62 pages long!)

• School: Santa Clara University
• Department: Chemistry and Biochemistry
• Course: CHEM 11H
• Professor: Tan

Document Summary

A chemical formula gives us equivalences between the element in the compound itself. Ex: how many tires in 5 dozen cars. How many h atoms in 5 mol h2o. 1 mol h2o = 6. 022 x 1023 molecules of h2o. 2 mol h = 1 mol h2s or 2 h = 1 h2s. = 0. 308 mol of h: how many grams of sulfur are in the sample. % of sulfur = (1*32. 066/34. 082) * 100% = 94. 085% 5. 25 g * 94. 085% = 4. 94 g of s. Method #2: know 1 mol h2s = 1 mol s. Empirical: simplest ratio of elements in a compound (also: simplest ratio of moles of elements in a compound) Molecular: actual number of atoms present in the compound. An integer multiple of the empirical formula. Empirical formula can be determined by decomposing the compound into component elements or combustion analysis. Combustion analysis: combusting an unknown organic compound (primarily c"s and h"s) into co2 and.