4. A salvage operator recovered coins believed to be gold. A sample weighed 385.000g and has a volume of 20.0mL. Were the coins gold (Density= 19.3g/mL) or yellow brass (Density =8.47g/mL)? Show your calculation and explain your answer.

The coins are gold

Explanation:

To solve this question we need to find the density of the sample knowing that density is the ratio between the mass of a sample (385.000g) and the volume that is occupying (20.0mL).

Density is:

385.000g / 20.0mL = 19.3g/mL

As the density of the sample is equal to the density of gold:

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.