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How much energy is made when a pice of wood burns. how do you know

Which is true of a liquid? it has a definite volume but not a definite mass.it has a definite mass but not a definite volume.it has a definite volume but not a definite shape.it has a definite shape but not a definite volume.

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.