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.

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

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

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?