when sodium metal is added to water, an orange flame is observed on the metal surface. based on this…
when sodium metal is added to water, an orange flame is observed on the metal surface. based on this observation, what can best be concluded?\na physical change occurs because the metal gets smaller.\na chemical reaction occurs because the liquid becomes cloudy.\na chemical reaction occurs because heat and light are given off.\na physical change occurs because vapor is released into the air.
Answer
Brief Explanations:
Los signos de una reacción química incluyen la liberación de calor y luz. La aparición de una llama naranja cuando el sodio se agrega al agua indica la liberación de calor y luz, lo que es un signo de una reacción química. Un cambio físico no produce calor y luz de esta manera.
Answer:
C. A chemical reaction occurs because heat and light are given off.