Science Notes: Modeling Conservation of Mass Flashcards
What is the difference between an element and a compound?
Element: A pure substance that cannot be broken down into simpler substances. Compound: A substance formed by the chemical combination of two or more elements.
State the Law of Conservation of Mass.
The Law of Conservation of Mass states that the total mass of reactants equals the total mass of products in a chemical reaction, even if a gas is produced.
What are the two main types of chemical bonds?
Ionic Bonds: Bonds formed by the transfer of electrons (e.g., NaCl). Covalent Bonds: Bonds formed by the sharing of electrons (e.g., H₂O).
Explain the role of coefficients and subscripts in a chemical equation.
Coefficient: A number placed in front of a chemical formula to indicate the number of molecules or atoms. Subscript: A number written below and to the right of a chemical symbol to indicate the number of atoms of that element in a molecule. Coefficients are adjusted to balance the equation, while subscripts remain unchanged as altering them would change the identity of the substance.
If you start with 10 grams of reactants, how many grams of products will you have after the reaction, even if a gas is produced?
According to the Law of Conservation of Mass, you will have 10 grams of products, as mass is neither created nor destroyed during a chemical reaction.
