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What is the most obvious sign of a chemical change in this reaction. a. a gas was produced. b. the powder mixed with the water. c. there was a change in temperature. eliminate d…

What is the most obvious sign of a chemical change in this reaction. a. a gas was produced. b. the powder mixed with the water. c. there was a change in temperature. eliminate d…
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What is the most obvious sign of a chemical change in this reaction.

a. a gas was produced.
b. the powder mixed with the water.
c. there was a change in temperature. eliminate
d. the powder dissolved in the water.?

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User Prashant Shrivastava
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9.0k points

1 Answer

5 votes
The correct answer would be "A" a gas was produced. A chemical change is when a compound changes shape or form. In this instance it changed from a liquid or solid, to a gas.
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User Eandersson
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8.1k points
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