properties that don't involve changes in composition
physical state of a substance depends on this
substance that changes to a gas easily at room temperature
amount of matter contained in a unit of volume
properties that can be observed only when there is a change in the composition of a substance
a substance's tendency to break down into different substances
law of conservation of mass
states that in a chemical change matter is neither created nor destroyed
the capacity to do work
chemical reactions that give off heat energy
chemical reactions that absorb heat energy
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