CHE 131 Chapter Notes - Chapter 3: Magnesium

• School: Stony Brook University
• Department: Chemistry
• Course: CHE 131
• Professor: Troy Wolfskill

Document Summary

Thinking in terms of amounts rather than masses allows us to view reactions as large populations of interacting particles rather than grams of material. Macroscopic level (g)- 2. 016g of h2 and 38g of f2 from 40. 02 g of hf. If we show it in moles instead, it makes a lot more sense. Macroscopic level (mol) 1 mol h2 and 1 mol f2 form 1 mol hf. Dividing by avogadro"s # give the reaction in individual molecules. 1 molecule h2 and 1 molecule f2 form 2 molecules hf. Chemical equation- a statement that uses formulas to express the identities and quantities of substances in a chemical or physical change: steps for balancing an equation. Balanced- the same number of each type of atom must appear on both sides of the equation (demonstrated w magnesium and oxygen. Translating the statement- skeleton equation - reactants > products w/o worrying about numbers just yet.