You add 9.3 g iron to 29.40 mL of water and observe that the volume of iron and water together is 30.58 mL . Calculate the density of iron.

7,881 g/L

Explanation:

Iron volume = 30.58 mL - 29.40 mL = 1.18 mL

1.18 mL / 1000 mL = 0.00118 L

Iron density = mass/volume

                    = 9.3g / 0.00118 L

                    = 7,881 g/L

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.