Lesson 3: Modeling Chemical Reactions
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13 Terms
Law of conservation of mass
The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
Open system
A system in which matter can enter from or escape to the surroundings
Closed system
A system in which no matter is allowed to leave or enter
Chemical equation
Contains all the info to summarize a chemical reaction
Formula
Combines the symbols of different elements to represent molecules
Reactant
Substance that changes during a chemical reaction
Product
Substance that is produced during a chemical reaction
Replacement reaction
When one element replaces another element or two elements trade places
Synthesis reaction
When two or more elements or compounds combine to make a more complex substance