Answer
Density of solid$=2.155\frac{g}{mL}$
Work Step by Step
We can find the mass of the benzene as
mass of benzene$=58.8-25=33.8 g$
Volume of benzene$=\frac{mass}{density}=\frac{33.8g}{0.880\frac{g}{cm^3}}=38.4 mL$ (we know that 1cm^3=1 mL)
Now volume of solid$=50-38.4=11.6mL$
Density of solid$=\frac{mass}{volume}$
we plug int the known values to obtain:
Density of solid$=\frac{25}{11.6}=2.155\frac{g}{mL}$
