When heating a test tube, covering it with a cork prevents injury from bubbling chemicals.
select the rewording that makes the statement true.
1. when heating a test tube, covering it with a cork causes chemicals to react evenly.
2. when heating a test tube, covering it with a cork prevents inhalation of toxic fumes.
3. when heating a test tube, covering it with a cork prevents vapors from catching fire.
4. when heating a test tube, covering it with a cork causes pressure to build up.