The reaction has two reactants with ions that seem to switch places.
The reaction has a single reactant that changes into two or more products.
The reaction involves oxygen reacting with a hydrocarbon and giving off heat.
The reaction involves a single product forming from two or more reactants.
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The clue that can be used to identify a chemical reaction as a replacement reaction is:
The reaction has two reactants with ions that seem to switch places.
In a replacement reaction (also known as a single replacement or double replacement reaction), ions in compounds swap partners, which is indicative of the "switching places" behavior described.
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