Question

The initial volume reading in a graduated cylinder is 30 mL. The mass of an irregular shape of an unknown metal piece is 55.3 g. The final volume reading in the graduated cylinder is 37 mL. The density of this unknown metal is _____.

Answer 1

Answer:

7.9$\frac{gr}{cm^3}$

Explanation:

When we put the metal piece in the liquid (which is in the graduated cylinder), how much it goes up is equal to the volume of the piece we inserted.

So now we know that the volume of that piece of unknown metal is 7mL (which is the same as 7$cm^3$).

Density is $\frac{mass}{volume}$.

So the density of that piece of metal is $\frac{55.3g}{7cm^3}$

Which leaves us with a final density of 7.9$\frac{gr}{cm^3}$