Lab: Physical and Chemical Changes Answers

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Have you gathered all the materials needed?

yes

Which answer below correctly identifies the type of change and the explanation when magnesium comes into contact with hydrochloric acid?

physical change because no color change occurred

physical change because the observation of a gas forming is evidence of a state change, which is reversible

chemical change because a temperature change occurred, a solid disappeared, and a gas was produced

chemical change because two substances were mixed, which always results in the formation of a new substance

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