Here's why:
* Subscripts represent the number of atoms of each element in a molecule. Changing a subscript would change the identity of the molecule itself. For example, H₂O (water) is different from H₂O₂ (hydrogen peroxide).
* Balancing equations is about conserving mass and atoms. We adjust the coefficients in front of each molecule to ensure the same number of atoms of each element appears on both sides of the equation.
What we *can* change:
* Coefficients: These numbers in front of the molecules are used to adjust the number of molecules involved in the reaction.
* States of matter: We can indicate whether a substance is a solid (s), liquid (l), gas (g), or aqueous solution (aq) on both sides of the equation.
Let me know if you'd like some examples to illustrate this further!
