Answer it fast.... Its urgent...
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0
Answer:
what's urgent
Step-by-step explanation:
Mark me brainlist for trying to help thx's :0
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4
Step-by-step explanation:
take a test tube... put sodium bicarbonate (baking soda) and add vinegar, then immediately cover the test tube with a balloon .... the realesed h2 gas can fill the balloon with gas.... try this
hope it helps...
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