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Questions and Answers
What are the signs of a chemical reaction?
What are the signs of a chemical reaction?
- Formation of a gas, color change, no precipitate formation, and temperature change
- Formation of a precipitate, color change, gas production, and temperature change (correct)
- Formation of a precipitate, color change, gas production, and no temperature change
- Formation of a gas, no color change, no precipitate formation, and temperature change
What is the law of conservation of mass in a chemical reaction?
What is the law of conservation of mass in a chemical reaction?
- Matter cannot be created or destroyed, only rearranged (correct)
- The total mass of products is always less than the total mass of reactants
- The total mass of products is always greater than the total mass of reactants
- Matter can be created and destroyed during a reaction
What is a chemical reaction?
What is a chemical reaction?
- A process that only involves physical changes
- A process that creates new elements
- A process that rearranges the molecular structure of substances (correct)
- A process that does not involve any change in substances
What type of chemical reaction involves the transfer of electrons from one substance to another?
What type of chemical reaction involves the transfer of electrons from one substance to another?
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What is the term for a chemical reaction in which a single compound breaks down into two or more elements or compounds?
What is the term for a chemical reaction in which a single compound breaks down into two or more elements or compounds?
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Which type of chemical reaction involves the combination of two or more substances to form a new compound?
Which type of chemical reaction involves the combination of two or more substances to form a new compound?
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