This question is impossible to answer. Even limiting it to organic matter on earth (the only place we have proof of organic matter) we do not know every creature that is on the earth. There are...
Mass is the defining characteristic of matter. However, the ultimate reason why matter has mass remains under debate and investigation by scientists. Some nuclear physicists believe that all mass...
There is insufficient information in the question to answer it. You did not state what it is for which you are looking for the total mass of. Please restate the question.