"Cellulose" is the systematic name for cotton. It is a fuel (it burns) and can be nitrated with a mixture of nitric and sulfuric acid to form Nitrocellulose, a high explosive. It is mostly used as a...
Typically 20,000 to 60,000. Cellulose is natural macro molecule without any specific size or molecular weight. The same applies to the esters of cellulose.