You add 7.8 g of iron to 23.20 mL of water and observe that the volume of iron and water together is 24.19 mL . Calculate the density of iron.

7.88g/mL is density of iron

Explanation:

As water and iron are insoluble, the volume of displaced fluid (Water) is equal to the volume of the solid (Iron). That means volume of the iron is:

24.19mL - 23.20mL = 0.99mL is the volume of iron

As density is the ratio between mass -7.8g- and volume of a compound -0.99mL- the density of iron is:

7.8g / 0.99mL =