The Mole Concept
Nobody counts grains of rice one by one at the market. Chemists don't count atoms either. They weigh them.
What this unit covers
Unit 5: The Mole Concept and Stoichiometry
- 1 The Mole ConceptNobody counts grains of rice one by one at the market. Chemists don't count atoms either. They weigh them. · 10 min
- 2 Percentage Composition, Empirical and Molecular FormulasGive a chemist the percentage of each element and she can tell you the formula. Here is the recipe. · 10 min
- 3 Balancing Chemical Equations and Reacting MassesA balanced equation is a recipe in moles. Read it right and you can predict any mass before you mix anything. · 10 min
- 4 Limiting Reagent and Percentage YieldThe reactant that runs out first calls the shots, and real reactions never quite deliver what the equation promises. · 10 min
- 5 The Ideal Gas Equation, Dalton's Law and Graham's LawOne equation for any gas, the reason air at Jos feels thinner, and why ammonia wins a race down a glass tube. · 10 min