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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
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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.?

User Prashant Shrivastava
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1 Answer

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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.
User Eandersson
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