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Which is an example of substances reacting chemically?
a. Paper being cut into small pieces
b. Chocolate melting in a pan
c. Flour and sugar mixed together in a bowl
d. Iron and oxygen forming rust

Respuesta :

Answer:

D

Explanation:

Iron and oxygen forming rust.

Answer:

D

Explanation:

Iron and Oxygen forming rust is a chemical reaction. It creates something new and it changes its chemical formula. Both signs of a Chemical Reaction

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