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 [...]

Objective: To determine the number of oxygen atoms in a potassium chlorate molecule.
Potassium chlorate is a compound composed of potassium (K), chlorine (Cl), and oxygen (O). It melts at 368°C and decomposes at 400°C into the solid compound, potassium chloride (KCl), with molecular oxygen (O2) driven off.
potassium chlorate          [...]