1. Work area, safety goggles Clean your work area thoroughly, put away all books and papers, and wear safety glasses. These will minimize the possibility that an unfortunate circumstance later will result in a serious injury.
2. The test tube Carefully select a test tube with a lip, a safety precaution that prevents the test tube [...]

A. Objective: Determine the chemical formula of magnesium oxide (MgXOY) by experiment using the mole concept.
B. The Experiment: Run a reaction between magnesium (Mg) and oxygen (O2) by heating magnesium in a crucible with the cover partially ajar. Use a 20 cm. strip for trial 1 and a 25 cm strip for trial 2. As [...]

Lab preliminaries the day before:
Students are informed that they must be on time to class. At the bell, the door will be locked and not opened until the end of the period. Furthermore, students will be shrunk in size so that may explore atoms individually rather than in huge masses. They [...]