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Ben and Jerry were testing powders in science lab. First they put the powder in a zip lock bag. Next they added some water. The powder fizzed and bubbled; soon it disappeared. When the bubbling stopped
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Ben and Jerry were testing powders in science lab. First they put the powder in a zip lock bag. Next they added some water. The powder fizzed and bubbled; soon it disappeared. When the bubbling stopped the bag contained a clear liquid and a lot of gas.

What is the MOST OBVIOUS sign of a chemical change in this reaction?

User Sahil Dhankhar
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2 Answers

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The powder fizzled and bubbled; soon it disappeared.
User IWantSimpleLife
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2 votes
The most obvious one is that when the powder came into contact with the water it fizzed.
User Raham
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