Which equations represent precipitation reactions? Na2S + FeBr2 → 2NaBr + FeS
MgSO4 + CaCl2 → MgCl2 + CaSO4
LiOH + NH4I → LiI + NH4OH
2NaCl + K2S → Na2S + 2KCl
AgNO3 + NaCl → AgCl + NaNO3

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.

i believe the answer is 5,000