Chemical Equations and More!

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded together. Examples include salad, air, and saltwater.

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What is a compound?

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A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and carbon dioxide (CO2).

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of reactants equals the total mass of products.

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What happens to atoms during a chemical reaction?

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During a chemical reaction, atoms get rearranged to form new substances. They do not appear or disappear.

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What is atomic mass?

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Atomic mass is the total number of protons and neutrons in an atom's nucleus. It is usually expressed in atomic mass units (amu).

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H) and oxygen (O).

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What is a chemical equation?

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A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

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Why do we balance chemical equations?

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We balance chemical equations to ensure that the number of atoms of each element is the same on both sides of the equation, in accordance with the law of conservation of mass.

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What are reactants in a chemical reaction?

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Reactants are the starting substances in a chemical reaction that undergo change to form products.

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What are products in a chemical reaction?

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Products are the substances formed as a result of a chemical reaction.