1-Escribe tres ejemplos de cambios químicos en los que se observe el desprendimiento de un gas sin aplicar calor. 2. Escribe tres ejemplos de cambios químicos en los que se observe la presencia de un precipitado.
3. Escribe tres ejemplos de cambios químicos en los que se observe la presencia de fuego o luz.

the correct answer is boyle

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

< 3

i think it is true since you can test the answer and can use observations to complete it.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.