Can a wedding ring with a volume of 0.5 cm3 and weighing 8g really be gold?

If the wedding ring is gold, then it is necessary that its density correspond to the tabular value of the density of gold (we assume that the ring should be made of pure gold (999 standard), and not a gold-based alloy).

ρ = m / V, where by condition m (mass of the wedding ring) = 8 g; V (volume of the gold ring) = 0.5 cm ^ 3.

Let’s perform the calculation:

ρ = 8 / 0.5 = 16 g / cm ^ 3 = 1600 kg / m ^ 3.

Since the density of gold is 1930 kg / m ^ 3, a wedding ring cannot be made of pure gold.