Answer to Question #319927 in General Chemistry for bell

Question

You add 6.9 g of iron to 23.40 mL of water and observe that the volume of iron and water together is 24.28 mL.

Calculate the density of iron.

Answer 1

Solution:

Density = Mass / Volume

Mass of iron = 6.9 g

Volume of iron = Volume of (water + iron) − Volume of water = 24.28 mL − 23.40 mL = 0.88 mL

Thus:

Density of iron = Mass of iron / Volume of iron

Density of iron = (6.9 g) / (0.88 mL) = 7.841 g/mL = 7.841 g/cm³

Density of iron = 7.841 g/cm³

Answer: The density of iron is 7.841 g/cm³