You are heating a substance in a test tube .always point the open end of the tube

asked Jun 22, 2020 13.5k views

2 votes

by Hbf

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5 votes

Answer:

id say point it upwards or check the instructions before starting the experiment

Step-by-step explanation:

Jhyap answered Jun 26, 2020

by Jhyap

8.4k points

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