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Because weathered surfaces may hide the color of minerals.
a chemical reaction in which a reactant loses one or more electrons, becoming more positive in charge!!!
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i have no clue you tell me and stop useing internet use your mind see im so bad at speling im in 12th grade usee your own mind.
Yes. The clue is in the word 'react'. Any reaction a substance undergoes is a chemical property.
I have no clue, I need that answer also for Chemistry... :-/
In chemistry - a catalyst - is a chemical added to an experiment to speed the reaction - without combining with any of the chemicals present.
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first when there's a physical change in the substance second there will be a solution or a formula to that substance third is, it involves temperature fourth is change in color of the substance fifth is the bubbling of another substance is yet an another clue that a chemical reaction has occured.
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In decomposition reaction, single reactant will breakdown to form two or more products.
Yes, it is a chemical change. It only takes one experience with a rotten egg to learn that they smell different that fresh eggs. When eggs and food spoil, they undergo a chemical change. The change in odor is a clue to the chemical change Chemical Reactions Chemical Changes are also called Chemical Reactions. Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction.
Normally letters are stamped and this stamp may provide a clue.
A change in the color of a solution is a sign thatthere is a chemical change happening. A chemical change happens when two substances combine forming another substance. It can also happen when two or more substances decompose.