Question

Use the information in the following chart to answer the question below. Substance Density (g/cm³) aluminum 2.7 iron 7.9 gold 19.3 You just found a metallic object in a creek bed. You have found its mass to be 96.5 g, and it displaces 5 mL of water. What is the substance?

Answer 1

Gold is metallic, with a yellow color when in a mass, but when excellently separated it may be black, ruby, or purple. Your density numbers have no units, so they are unusable.

If the numbers you give match to the densities of the given metal in g/ml or kg/L, it should be gold.

Density = mass/volume, so:

96.5g/5ml = 19.3 g/ml. So the answer is 19.3 gold.