Define chemical reactions State four observations help us to determine that a chemical reaction has taken place. Write one example of each observation with a balance chemical equation.please and fast today please expetd no links
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The reaction which took place chemically is called as a chemical reaction.
example for this is
Mg+CUSO4------>MgSO4+Cu
H2O------>H+OH
example for this is
Mg+CUSO4------>MgSO4+Cu
H2O------>H+OH
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