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Chemistry Review. Formation of a precipitate is a clue that a ________ has happened. Chemical Reaction. Energy cannot be _______or destroyed,. Created. A change in _______ is a clue that a chemical reaction has happened. Color. How many elements are in the following substance? COMg.
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Formation of a precipitate is a clue that a ________ has happened.
A change in _______ is a clue that a chemical reaction has happened.
3 capital letters in a row mean a new substance
What kind of reaction is more energy released than absorbed?
In a chemical equation, what comes before and after the arrow?
How many of each atom is in the following substance? H2O(C3H)2
H = 4 O = 1 C = 6