Identifying Line Formulas

Select a Problem

Click the Show Problem Button

A three-dimensional molecular structure will be displayed here, and may be moved about with the mouse. Carbon is gray, hydrogen is cyan, oxygen is red, and nitrogen is dark blue.
One of the line formulas in the space beneath the model best represents the structure. Select the correct formula by pressing the button beneath it. A response to your answer will be presented by clicking the Check Answer button.

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A set of formulas, one of which corresponds to the molecular model, will be displayed here.
You must select the correct formula by pressing the button beneath it.

With some browsers it may be necessary to click a button twice for action.

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Carbon Atom Classification →