adrianahf012
adrianahf012 adrianahf012
  • 21-07-2016
  • Chemistry
contestada

A release of energy is a sign that _________.

a physical change has just occurred
oxygen is present
a chemical change is taking place
organic chemicals are present

Respuesta :

hanima
hanima hanima
  • 21-07-2016
I think a physical change had just occurred
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