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molecules are tightly packed, have a definite shape and volume, cannot be compressed, and only vibrate a little
molecules are loosely packed, have a definite volume but do not have a definite shape, cannot be compressed, and move somewhat
molecules are very far apart, have no definite shape or volume, can be compressed, and move very fast
a property of a pure substance that describes its ability to CHANGE into different substances
chemical property that describes how easily a substance will react with another substance, ie. baking soda reacting with vinegar
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