Chemical Reactions Review

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What is a chemical reaction?

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A process in which substances (reactants) undergo a transformation to form new substances (products).

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What are reactants in a chemical reaction?

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Substances that are present at the start of a chemical reaction and are transformed into products.

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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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What is the purpose of balancing a chemical equation?

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To ensure that the number of atoms of each element is the same on both sides of the equation, following the law of conservation of mass.

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What is a coefficient in a chemical equation?

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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 is the difference between a coefficient and a subscript in a chemical formula?

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A coefficient indicates the number of molecules, while a subscript indicates the number of atoms of an element in a molecule.

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What does the arrow in a chemical equation represent?

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The arrow indicates the direction of the reaction, showing that reactants are transformed into products.

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What is the significance of the states of matter in a chemical equation (e.g., solid, liquid, gas)?

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They provide information about the physical state of the reactants and products, which can affect the reaction conditions and outcomes.

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

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By adding the subscripts of each element in the chemical formula. For example, in H2O, there are 2 hydrogen atoms and 1 oxygen atom.

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What is a synthesis reaction?

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A type of chemical reaction where two or more reactants combine to form a single product.