Course Chapters
Section Tests
Online Calculators Linear Least Squares Regression Newton's Method Equation Solver
Related Information Links

Another Problem 2Question:When iron rusts the surface iron reacts with the oxygen in the atmosphere to form iron oxide (the reddish rusty stuff). This is a compound consisting of a 3 : 2 ratio of oxygen and iron atoms. If the rust contains 3216 oxygen atoms, how many iron atoms are there in the rust?
Solution: 2144 atoms
We solve the proportion 3 : 2 = 3216 : x to get x = 2144 atoms. 
Copyright © 19962008 Shodor
Please direct questions and comments about this page to
WebMaster@shodor.org