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Questions and Answers
What does the Law of Conservation of Mass state in relation to chemical reactions?
What does the Law of Conservation of Mass state in relation to chemical reactions?
- The mass of the reactants and products can vary in a chemical reaction
- The total mass of the reactants equals the total mass of the products (correct)
- The mass of the reactants decreases in a chemical reaction
- The mass of the products is always greater than the mass of the reactants
What is a chemical reaction?
What is a chemical reaction?
- A process that involves only the rearrangement of atoms
- A process that transforms one or more substances into different substances (correct)
- A process that creates new elements
- A process that only changes the physical state of a substance
What does a chemical equation represent?
What does a chemical equation represent?
- The physical state of the reactants and products
- The speed of the reaction
- The symbolic representation of a chemical reaction (correct)
- The exact mass of the substances involved
What does a chemical equation represent?
What does a chemical equation represent?
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What is the purpose of balancing a chemical equation?
What is the purpose of balancing a chemical equation?
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In a chemical equation, what are the substances to the left of the arrow called?
In a chemical equation, what are the substances to the left of the arrow called?
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Study Notes
Chemical Reactions and Equations
- The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction.
- A chemical reaction is a process in which one or more substances are converted into new substances.
- A chemical equation is a symbolic representation of a chemical reaction, with reactants on the left and products on the right, separated by an arrow.
- The purpose of balancing a chemical equation is to ensure that the number of atoms of each element is the same on both the reactant and product sides.
- In a chemical equation, the substances to the left of the arrow are called reactants, and the substances to the right of the arrow are called products.
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