Evidence of Chemical Reactions

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What is evidence of a chemical reaction?

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Evidence of a chemical reaction can include color change, gas formation (bubbles), formation of a precipitate (solid), or temperature change.

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What happens when a clear liquid is mixed with another clear liquid and a yellow solid forms?

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The formation of a yellow solid indicates that a new substance has been created, suggesting a chemical reaction has occurred.

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What is a chemical change?

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A chemical change is a process where a substance transforms into a different substance with different properties.

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What are some signs that a chemical reaction has occurred?

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Signs of a chemical reaction include color change, gas production, formation of a precipitate, and temperature change.

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What does the formation of bubbles in a reaction indicate?

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The formation of bubbles typically indicates that a gas is being produced, which is a sign of a chemical reaction.

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What is the chemical formula for serotonin?

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The chemical formula for serotonin is C10H12N2O.

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How many total atoms are in a molecule of serotonin?

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There are 25 atoms in a molecule of serotonin (10 Carbon, 12 Hydrogen, 2 Nitrogen, and 1 Oxygen).

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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What is combustion in terms of chemical reactions?

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Combustion is a chemical reaction that typically involves the burning of a substance in the presence of oxygen, producing heat and light.