KBr + AgNO3 → KNO3 + AgBr Zn + 2HCI - H2 + ZnCl2 MgCO3 → MgO + CO2 2Fe(OH)3 - Fe2O3 + 3H20 Na2CO3 + Ca(OH)2 → CaCO3 + 2NaOH AgNO3 + HCl → AgCl + HNO3 Out of the chemical equations above, how many is (are) considered as a double replacement reaction? _​

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.