They give us the volume of the substance, to calculate the mass we can relate the property of density which is equal to:
[tex]\rho=\frac{M}{V}[/tex]Where,
M is the mass of the substance
V is the volume
The density of Fe2O3 can be found in the table of properties of substances. At standard conditions, the density is equal to: 5.242 g/cm3.
The mass will be:
[tex]\begin{gathered} \rho=\frac{M}{V} \\ M=\rho\times V \\ M=5.242\frac{g}{cm3}\times52.3L\times\frac{1000cm^3}{1L}=274156.6g=274.2Kg \end{gathered}[/tex]So, the mass of 52.3L of Fe2O3 is 274.2 Kg
