Answer:
No. The density of the gold-colored ring is 16.9 g/mL, which is less than that of pure gold, whose density is 19.3 g/mL. Therefore, the ring is not pure gold.
Step-by-step explanation:
Density is an intrinsic property of a substance, which means that it is a characteristic of the substance that is independent of the size or amount of the sample. This makes density a useful property for identifying a substance, such as gold, as it can be determined for any size or amount of the sample.
In this question, by comparing the density of the ring to the known density of pure gold, we can determine whether the ring is pure gold. If the ring had the same density as pure gold, we would conclude that it is pure gold.
The density of a substance can be calculated by dividing its mass by its volume, both of which are provided:
Density = mass / volume
The density of the ring = 18.9 g / 1.12 mL = 16.9 g/mL
The known density of pure gold is 19.3 g/mL. Since the density of the ring is less than the density of pure gold, the ring is not pure gold.