When heating a liquid sample in a test tube, the mouth of the test tube should be...
- A ) inverted.
- B ) located under the student.
- C ) pointed away from the student.
- D ) heated first, not the bottom of the test tube.
- A ) inverted.
- B ) located under the student.
- C ) pointed away from the student.
- D ) heated first, not the bottom of the test tube.