A metal part weighing 949 g has a volume of 130 dm3. What kind of metal is it?

In order to determine from which metal a given part is made, we calculate its density and find the metal from the table of substance density.

ρ = m / V, where m is the mass of a given part (m = 949 g = 0.949 kg), V is the volume of a given part (V = 130 dm3 = 130 * 10-3 m3).

Let’s do the calculation:

ρ = 0.949 / (130 * 10-3) = 7.3 kg / m3. There is no metal with this density.

The metal tin has a density of 7300 kg / m3, but for this the mass of the part must be equal to 949 kg or the volume is 130 cm3.