Electrolysis can be used to separate H2O into hydrogen and oxygen.
A chemical change. If the identity of of the chemicals involved change in identity, it is a chemical change.
co2 and h20
h20 does not form a bond
A physical change means that only the appearance of the substance has changed. So if your tear up a piece of paper, its still paper so a physical change has taken place. If you heat or freeze water its only a change of state so its still a physical change. So long as the molecular or chemical structure of the atom/substance does not change it will always be a chemical change. H20 will always be H20.
A physical change means that only the appearance of the substance has changed. So if your tear up a piece of paper, its still paper so a physical change has taken place. If you heat or freeze water its only a change of state so its still a physical change. So long as the molecular or chemical structure of the atom/substance does not change it will always be a chemical change. H20 will always be H20.
Yes ,but in ice form. There is about 10%
A physical change means that only the appearance of the substance has changed. So if your tear up a piece of paper, its still paper so a physical change has taken place. If you heat or freeze water its only a change of state so its still a physical change. So long as the molecular or chemical structure of the atom/substance does not change it will always be a chemical change. H20 will always be H20.
Freezing water is a physical change because the molecules stay the same, only changing from a liquid to a solid state. Chemical changes involve the rearrangement of atoms or molecules to form new substances.
51.2 g H20
physical
it is a form of energy,oil,h20 and air
It is a physical change because the substance is still the same. It's still H20, just in a different phase of matter.