CHM 1025 Lecture Notes - Lecture 2: Chromium(Iii) Chloride, Copper(Ii) Carbonate, Phosphorus Trichloride
Document Summary
Worked example 2. 1 using the law of multiple proportions. Methane and propane are both constituents of natural gas. Show that the two compounds obey the law of multiple proportions. Find the c : h mass ratio in each compound, and then compare the ratios to see whether they are small whole-number multiples of each other. Ordinary lead pencils actually are made of a form of carbon called graphite. Begin with the known information, and set up an equation using appropriate conversion factors so that the unwanted units cancel. In this example, let"s begin with the width of the pencil line in millimeters, then convert to meters, and then divide the line width in meters by the diameter of a single atom in meters. A single carbon atom is about 10 10 m across, so it takes 1010 carbon atoms placed side by side to stretch.
