Round each number as indicated: (a) 1.236 7 to 4 significant figures (b) 1.238 4 to 4 significant figures (c) 0.135 2 to 3 significant figures (d) 2.051 to 2 significant figures (e) 2.005 0 to 3 significant figures
Adeline Fecker February 14th, 2017 CH 222 Lecture Notes Week 6 Previously: ❖ Stoichiometry when reaction involves gases ❖ Use balanced equation to find molar ratios Now: ❖ Apply to kinetic molecular ❖ Understand effusion and diffusion of a gas Clicker Question: 1. Is there a chemical reaction a. Yes--- use stoichiometry b. No----use combined gas law Kinetic Molecular Theory: ➢ The simplest model for behavior of gases ➢ Gas is modeled as a collection of particles Postulates 1. Particles are tiny with large spaces between them, volume of each particle is so small compared to total it is assumed to be zero 2. Gas particles are in constant, random
