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Law of Conservation of Mass quiz

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  • Who is credited with originating the law of conservation of mass?
    Antoine Levasseur, a French chemist, is credited with originating the law in 1789.
  • What does the law of conservation of mass state about matter in a chemical reaction?
    It states that matter is neither created nor destroyed in a chemical reaction, but only changes form.
  • What are reactants in a chemical reaction?
    Reactants are the substances present before a chemical reaction occurs.
  • What are products in a chemical reaction?
    Products are the substances formed as a result of a chemical reaction.
  • In the reaction H2 + O2 → H2O, what are the reactants?
    The reactants are hydrogen (H2) and oxygen (O2).
  • In the reaction H2 + O2 → H2O, what is the product?
    The product is water (H2O).
  • If the total mass of reactants is 100 grams, what will be the total mass of products after the reaction?
    The total mass of products will also be 100 grams.
  • Does the law of conservation of mass allow for any loss of matter during a chemical reaction?
    No, all matter is accounted for; it is only transformed, not lost.
  • How does the law of conservation of mass help in chemistry calculations?
    It allows us to determine the amount of product that can be formed from a given amount of reactants.
  • Why is the law of conservation of mass fundamental to stoichiometry?
    Because stoichiometry relies on the fact that the mass of reactants equals the mass of products.
  • What year did Antoine Levasseur originate the law of conservation of mass?
    He originated the law in 1789.
  • What happens to the mass of reactants during a chemical reaction according to the law?
    The mass of reactants is completely converted into the mass of products.
  • How does the law of conservation of mass relate to solution chemistry?
    It ensures that the total mass remains constant, which is important for calculations in solution chemistry.
  • What does the law of conservation of mass imply about the atoms in a chemical reaction?
    It implies that all atoms present in the reactants are rearranged to form the products, with none lost.
  • What is the significance of knowing the total mass of reactants before a reaction?
    Knowing the total mass of reactants allows you to predict the total mass of products formed.