Q1. A spherical ball of solid, nonporous naphthalene (as in a "moth ball") is suspended in still air; naphthalene ball slowly sublimes, releasing the naphthalene into the surrounding air by molecular diffusion limited procedure. approximation the time required to reduce the diameter from 2 cm to 0.5 cm when the surrounding air is at 347 K and 1.013 x 105 Pa. Naphthalene has a molecular weight of 128 g/mole, a solid density of 1.145 g/cm3, a diffusivity in the air of 8.19 x 10-6 m/s, and exerts a vapour pressure of 5 torr at 347 K.
Q2. Excess dietary fat could be converted to cholesterol in the liver. When palmitate labelled with 14C at every odd-numbered carbon is added to a liver homogenate, where does the label show in mevalonate?