3. Study the following reactions. Write balanced equations applying the law of mass
conservation.
(a) Calcium carbonate (CaCO3) decomposes to give calcium oxide (CaO) and carbon
dioxide (CO2).
(b) Sodium reacts with water giving sodium hydroxide (NaOH) and hydrogen (H).
(c) Magnesium (Mg) reacts with oxygen (O) to give magnesium oxide (Mgo).
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Answer:
sodium reached with water
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