Question

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.

Answer 1

Gold

Step-by-step explanation:

We are given that

Mass of sample ,m=385 g

Volume ,V=20mL

We have to find the coin is gold or yellow brass.

We know that

Density=
`(Mass)/(volume)`

Using the formula

`Density=(385)/(20)g/mL`

`Density=19.25g/mL`

`Density\approx 19.3g/mL`

Density of coin=19.3g/mL

Density of gold=19.3g/mL

Hence, the coin is gold.