drag the missing word into place\none: a reaction’s always the same,\ndo the same reaction again, it won’t…

drag the missing word into place\none: a reaction’s always the same,\ndo the same reaction again, it won’t change.\nreactions occur in predictable ways\nconserve\ncompound\nchemical

drag the missing word into place\none: a reaction’s always the same,\ndo the same reaction again, it won’t change.\nreactions occur in predictable ways\nconserve\ncompound\nchemical

Answer

Brief Explanations:

En química, las reacciones químicas tienen un comportamiento predecible y siempre son las mismas bajo las mismas condiciones. La palabra adecuada para completar la frase es "chemical" ya que se refiere a este tipo de reacciones.

Answer:

chemical