How do you write the formula for a compound made from Fe 3+ and OH -1 ions? a: FeOH
b: Fe3OH
c: FeOH3
d: Fe (OH)3

the answers would be

the first one and the second one

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.