Law of Conservation of Matter

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What is the Law of Conservation of Matter?

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The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

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What does a coefficient in a chemical equation represent?

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A coefficient indicates the number of molecules or moles of a substance involved in a chemical reaction.

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In the equation 3H₂ + O₂ → 3H₂O, what does the coefficient '3' in front of H₂O signify?

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It signifies that three molecules of water (H₂O) are produced in the reaction.

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What are reactants in a chemical equation?

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

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What are products in a chemical equation?

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

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How do you determine if a chemical equation is balanced?

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A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

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What is the significance of balancing chemical equations?

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Balancing chemical equations ensures that the Law of Conservation of Matter is upheld, showing that mass is conserved in a reaction.

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

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A chemical reaction involves the transformation of substances into new products, while a physical change alters the form of a substance without changing its chemical identity.

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What is an example of a chemical reaction?

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An example of a chemical reaction is the combustion of methane: CH₄ + 2O₂ → CO₂ + 2H₂O.

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What does it mean for a reaction to be exothermic?

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An exothermic reaction is one that releases energy, usually in the form of heat, to the surroundings.