Chemical Equations

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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 involved.

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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 new substances formed as a result of a chemical reaction.

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What does the coefficient in a chemical formula indicate?

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

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What does the subscript in a chemical formula indicate?

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The subscript indicates the number of atoms of an element in a molecule.

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How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients to ensure the same number of each type of atom appears on both sides of the equation.

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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 is a diatomic molecule?

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A diatomic molecule is a molecule composed of two atoms, which can be of the same or different elements (e.g., H2, O2, Cl2).

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What is a balanced chemical equation?

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A balanced chemical equation has equal numbers of each type of atom on both sides of the equation.

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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.