Overview of CheMentor Introduction Objectives Role of the student Role of the software Design Elements Types of Module The Menu System Individual Modules - details and on-line samples: Significant Figures Unit Factors Isotopes Ion Recog/Writing Formulae Rec/Writg Mass/Mole Conversions %Composition (Cmpds) Oxidation Numbers Periodic Table Ions Reference Molar Mass Calculator Empirical and Molecular Formulae Reviews of CheMentor Pricing and Ordering Download a Demo CheMentor Home Page

Using Unit Factors in Two-Step Problems

This program contains exercises in which you build unit factors and solve problems that will involve the use of two unit factors. On the screen is a listing of a series of equations ('1 L = 1000 mL') and you will these equations to make the required unit factors. You build the factors by clicking on one of the items in the equation and then clicking in a 'Numerator' or 'Denominator' box to place the item at that location. You then click on the 'Judge' button to have your answer checked. The numerical part of your answer is entered in the answer box(es) - it can be in decimal or scientific notation and you can always 'Peek' to see the expected answer. You can try out the program by using the demo version that you will see further down in this page. All of the links you will need for the other items in this module are listed below. Just click on the graphic for the item you want ... About the buttons you will see in the program window ...

The 'New' button - generates a new exercise The 'Judge' button - click this to have your answer checked The 'Restart' button - clears the scoreboard and starts a new series of exercises The 'Info' button - not active in this demo - will display a pop-up window that gives you information on how to build a unit factor

The 'Info' button - opens a pop-up window that gives you directions on how to build a unit factor The 'Quit Practice' button - not active in this demo, it would return you to the CheMentor main menu The 'Activities Menu' button - not active in this demo, it would return you to the menu for the module

The 'Sci/Dec' button - allows you to change the answer boxes so that you can give an answer in either scientific or decimal notation The 'Clear' button - clears the answer boxes The 'Peek' button - allows you to see the set-up and answer that was expected

Link to the other modules ...