Chemistry, 30.01.2020 20:02 wolffee895

During science lab, some students added small pieces of magnesium ribbon to 10 ml of hydrochloric acid. they noticed that bubbles formed, the test tube got hot, and the magnesium disappeared.
which is a sign that a chemical reaction has taken place in this experiment?
a) change in odor
b) change in color
c) release of heat energy
d) disappearance of magnesium

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