PDF Notes: UNIDAD 2 - CLASE 3 - Estequiometría (1)

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    What happens during a chemical reaction?

    Bonds are broken and formed, changing substance identities.

    What indicates a chemical reaction has occurred?

    Observable physical evidence like gas release or color change.

    What is the purpose of a chemical equation?

    To represent the reactants and products of a reaction.

    What must be true about chemical equations?

    They must be balanced to conserve mass.

    How do you balance a chemical equation?

    Adjust coefficients without changing subscripts.

    What does stoichiometry allow us to calculate?

    Quantities of pure substances in chemical reactions.

    What is the relationship between reactants and products in stoichiometry?

    Expressed in moles, not grams.

    What does the law of conservation of mass state?

    Mass of reactants equals mass of products in a reaction.

    What do stoichiometric relationships serve as?

    Conversion factors for reactants and products.

    What is a key constraint when balancing equations?

    Subscripts must not be altered.