A tabulation of data lists the following equation for calculating the densities (d) of solutions of naphthalene in benzene at 30 °C as a function of the mass percent of naphthalene. 

Use the equation above to calculate 

(a) The density of pure benzene at 30 °C; 

(b) The density of pure naphthalene at 30 °C; 

(c) The density of a solution at 30 °C that is 1.15% naphthalene; 

(d) The mass percent of naphthalene in a solution that has a density of 0.952 g/cm³ at 30 °C.

Transcribed Image Text:

d(g/cm³) = 1 1.153-1.82 x 10-3³(%N) + 1.08 x 10-6(%N)²