A soil sample having wet mass of 1000g and volume of 650cm^3 was oven dried and had dry mass of 800g. Assume the typical particle density of 265g/cm^3 of mineral soil calculate; a) porosity?

Bulk density is defined as the mass of dry soil per unit volume, and it is calculated using the formula:

Bulk density = Dry mass / Volume

Given that the dry mass is 800g and the volume is 650cm^3, we can substitute these values into the formula to calculate the bulk density:

Bulk density = 800g / 650cm^3

Bulk density = 1.23 g/cm^3

Therefore, the bulk density of the soil sample is 1.23 g/cm^3.