Teniendo en cuenta los siguientes fenómenos: ebullición del agua- movimiento de un cuerpo- disolución de sal en agua- combustión de la leña- oxidación del hierro – evaporación del alcohol- fusión del cobre – descomposición del agua en hidrógeno y oxígeno. Indica cuales se tratan de reacciones químicas. Justifica tu respuesta.

What is the cellular process that releases the energy stored in food molecules

What metric units would you use to measure the thickness of a key

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt