Write “true” or “false” for each statement. 

(a) We balance chemical equations as we do because energy must be conserved. 

(b) If the reaction 2 O₃(g) → 3 O₂(g) goes to completion and all O₃ is converted to O₂, then the mass of O₃ at the beginning of the reaction must be the same as the mass of O₂ at the end of the reaction. 

(c) You can balance the “water-splitting” reaction H₂O(l) → H₂(g) + O₂(g) by writing it this way: H₂O₂(l) → H₂(g) + O₂(g).