ChemistryCh2Sec4
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How does chemical change affect the composition of matter?
During a chemical change, the composition of matter always changes.
In a chemical reaction, how does the mass of the reactants compare with the mass of the products?
During a chemical reaction, the mass of the products is always equal to the mass of the reactants.
Chemical Reaction
One or more substances change into new substances
Four possible clues that a chemical change has taken place
Transfer of energy, change in color, production of gas, formation of precipitate
Chemical Change
is the same as Chemical reaction