Chemistry

Chemistry, 03.08.2019 17:00, SoccerHalo

Two compounds are mixed. which statement is true if there is only a physical reaction? a. the color changes. b. heat is released. c. the mixture precipitates. d. no changes occur.

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Physics, 27.08.2019 12:20, kidlol

When two substances are mixed together, a color change is observed. does this mean that a chemical reaction has definitely occurred? yes because any change indicates a chemical reaction. no because some physical changes produce color changes. no because color changes are not indicators of chemical reactions. yes because color changes occur only when new compounds are formed.

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Chemistry, 13.10.2019 00:00, glizbethh00

Two compounds are mixed and light is emitted, the color changes, and heat is liberated. which activity has occurred? a. chemical reactionb. chemical mixturec. chemical nucleus exchanged. chemical compromise

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Chemistry, 08.11.2019 17:31, diamondktaylor

When two substances are mixed together, a color change is observed. does this mean that a chemical reaction has definitely occurred? - yes because any change indicates a chemical reaction. - no because some physical changes produce color changes. - no because color changes are not indicators of chemical reactions. - yes because color changes occur only when new compounds are formed.

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