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


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