A sample of dry soil is mixed uniformly with 16 wt% water and then compacted into a cylindrical mold in the laboratory. The volume of moist soil is 1x10-3 m3 and its mass is equal to 1.60 kg. The relative density of the soil grains is equal to 2.68. Determine:
a) its dry density, void ratio and degree of saturation;
b) the moisture content required to have full saturation, assuming that the total sample volume remains constant.