Question

Martina has a sample of an unknown substance. She measures the substance. Its mass is 13.5 grams, and its volume is 5 cm3. Which metal might her sample be made of?

Answer 1

Density of the metal= 13.5/5=2.7g/cm^3
The metal is aluminium (assuming it is of uniform density)

Answer 2

Explanation:

It is given that,

Mass of the unknown substance, m = 13.5 gm

Volume of the substance, $V=5\ cm^3$

We need to tell the unknown sample is made up of. It can be indicated using the density of the sample. It can be calculated as :

$d=\dfrac{m}{V}$

$d=\dfrac{13.5\ gm}{5\ cm^3}$

$d=2.7\ g/cm^3$

So, the density of the sample is $2.7\ g/cm^3$. The unknown sample is aluminium. Hence, this is the required solution.