Chemical Reactions Review

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What is a chemical reaction?

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A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

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What are reactants in a chemical reaction?

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Substances that undergo change during a chemical reaction.

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What are products in a chemical reaction?

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Substances that are formed as a result of a chemical reaction.

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How do you determine the number of atoms in a compound?

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By using the coefficients and subscripts in the chemical formula. For example, in 2MnO4, there are 2 manganese (Mn) atoms.

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What is the law of conservation of mass?

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In a chemical reaction, mass is neither created nor destroyed; it remains constant.

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What is a balanced chemical equation?

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An equation where the number of atoms for each element is the same on both sides, indicating that mass is conserved.

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What is a synthesis reaction?

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A type of chemical reaction where two or more simple substances combine to form a more complex product.

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What is a decomposition reaction?

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A type of chemical reaction where a single compound breaks down into two or more simpler products.

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What is a combustion reaction?

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A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat.

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What is a single replacement reaction?

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A type of chemical reaction where one element replaces another element in a compound.