Question

You can identify a metal by carefully determining its density. A 8.44 g piece of an unknown metal is 1.25 cm long, 2.50 cm wide, and 1.00 cm thick. What is a possible identity of the element?Aluminum, 2.70 g/cm3Titanium, 4.54 g/cm3Zirconium, 6.51 g/cm3Chromium, 7.20 g/cm3Nickel, 8.90 g/cm3

Answer 1

Answer: Nickel

Explanation:

They have the same density as each other

Answer 2

Answer: Aluminum, $2.70 g/cm^3$

Explanation:

Density is defined as the mass contained per unit volume.  It is characteristic of a substance.

$Density=\frac{mass}{Volume}$

Given : Mass of object = 8.44 grams

Volume of object=$length\times breadth\times height=1.25cm\times 2.50cm\times 1.0cm=3.125cm^3$

Putting in the values we get:

$Density=\frac{8.44g}{3.125cm^3}=2.70g/cm^3$

Thus density of the object will be $2.70 g/cm^3$  which matches that of aluminium.