If a terrestrial ecosystem has a net primary production of 3,000 kcal/m2/yr and a cellular respiration rate of 2,000 kcal/m2/yr, what is the gross primary production for this ecosystem? 100 kcal/m2/yr 500 kcal/m2/yr 1,000 kcal/m2/yr 5,000 kcal/m2/yr

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.