When calcium carbonate is heated, it decomposes to form two products, one of which is calcium oxide. CaCO3 + CaO + ?

Explain how the law of conservation of mass can be used to identify the second product of the reaction and then identify that product.

answer; i believe that the correct answer is (a) potassium(k)

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

catya your not at all which answer i've seen you do this on another question!