4 years ago

Helpp.............................

Biology

2 answers:

zaharov [31]4 years ago

8 0

Answer:

The answer is A

Explanation:

It is logical because the balloon lets the student see how much gas is released in the reaction. the balloon inflates with invisible air the student will normally not see.

kvv77 [185]4 years ago

3 0

Answer:

the answer is A

Explanation:

A.it Is logical, because it allows the student to catch any invisible gases given off

Hope this helps 

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