Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is the law of the conservation of mass?
   • The law of conservation of mass states that no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants.
2. Why must we ensure that chemical equations are balanced?
   • To accurately represent that no atoms are being made or lost during a chemical reaction, they are just converting from one form to another.
3. What do the multipliers in normal script before a chemical formula represent? Eg 2MgO
   • The normal script numbers before a chemical formula represent you have that many of that particular atom or molecule. In the example 2MgO, the 2 represents that there are two molecules of MgO