CHEM 1211K Lecture Notes - Lecture 3: Molar Mass, Balance Equation, Chemical Equation

• School: Dalton State College
• Department: Chemistry
• Course: CHEM 1211K
• Professor: John Shim

Document Summary

Sample (h): g h20 mol h2o mol h g h 1 mol h2o = 2mol h ** Mol h= 13. 5g h2o x (1 mol h2o/18g h2o) x (2 mol h/1 mol h2o) = 1. 5 mol h g h: 1. 5 mol h x (1g h/1 mol h) = 1. 5g h. Sample (co2): g co2 mol co2 mol c g c = 1 mol co2 = 1 mol c. Mol c= 22. 0g co2 x (1 mol co2/44g co2) x (1 mol c/1 mol co2) = 0. 50 mol c g c: 0. 50 mol c x (12g c/1 mol c) = 6. 0g c. Example: 30. 46g n x (1 mol n/14g n) = ? mol n (answer: 2. 174 n) 69. 54g o x (1 mol o/16g o) = ? mol o (answer: 4. 346 o) *chemical reaction: process in which one or more substances is changed during reaction. *chemical equation: uses chemical symbols to show what happens in chemical reaction.