Conservation of mass and balanced symbol equations

12 questions

1. What is a molecule?
2. In a chemical reaction, the substances formed are called ___.
3. Which of the following is a compound?
4. What happens to atoms during a chemical reaction?
5. What is the chemical formula for carbon dioxide?
6. A chemical symbol ___ is a representation of a chemical reaction using the symbols of the elements involved.
7. What does the arrow in a chemical equation represent?
8. Which of the following statements about the mass of reactants and products in a chemical reaction is correct?
9. What is a word equation?
10. Why must symbol equations be balanced?
11. A ___ represents a substance using element symbols and the number/ratio of atoms of each element in the substance.
12. To balance a chemical equation, you need to change the ___ in front of the chemical formulas to ensure there are equal numbers of atoms of each element on both sides of the equation.

License: OGL