Data from measuring the apparent density of a Vidalia onion by submerging in toluene in a pycnometer are as

follow:

Density of toluene $=865k\frac{g}{m^3}$

Mass of the pycnometer $=75\mathrm{.}87g$

Mass of the pycnometer $+$ toluene $=126\mathrm{.}58g$

Mass of the pycnometer $+$ onion $=85\mathrm{.}87g$

Mass of the pycnometer $+$ toluene $+$ onion $=127\mathrm{.}38g$

The composition of the Vidalia onion is:

A$.$ What is the apparent density of the onion?

B$.$ What is the true density of the onion?

C$.$ What is the porosity of the onion?

D$.$ Comment on whether the porosity you calculated is reasonable. Briefly explain.