Chemical Reaction test

Front

What is a chemical reaction?

Back

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 is a reactant?

Back

A substance that is present at the start of a chemical reaction and is consumed during the reaction.

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What is a product?

Back

A substance that is formed as a result of a chemical reaction.

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What does a coefficient represent in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

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What does a subscript indicate in a chemical formula?

Back

A number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

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How do you balance a chemical equation?

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By adjusting the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

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What is the difference between an endothermic and exothermic reaction?

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An endothermic reaction absorbs energy (heat) from the surroundings, while an exothermic reaction releases energy (heat) to the surroundings.

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What is a decomposition reaction?

Back

A type of chemical reaction where one compound breaks down into two or more simpler substances.

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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 substance.