Agram of gold has the same as a kilogram of gold.
a. mass
b. weight
c. density
d. volume

C. density

Explanation:

The density of a substance is an intrinsec property of the substance. It can be calculated as the ratio between the mass (m) and the volume (V):

however, it does not depend on these two variables, instead it depends only on the chemical composition of the substance or of the element.

In this problem, we have a gram of gold and a kilogram of gold. The mass of the two samples is different (1 g vs. 1 kg), but the density is the same, because the substance is the same (gold), so the density does not change.