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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.

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lublana

Answer:

Gold

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=[tex]\frac{Mass}{volume}[/tex]

Using the formula

[tex]Density=\frac{385}{20}g/mL[/tex]

[tex]Density=19.25g/mL[/tex]

[tex]Density\approx 19.3g/mL[/tex]

Density of coin=19.3g/mL

Density of gold=19.3g/mL

Hence, the coin is gold.

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