For the quintessence of classical philosophy, see Aether (classical element). Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earth's crust.
The weight of a polo shirt depends on the size and fabric. The  average weight for a men's short-sleeved polo shirt in size large  is about 8 ounces.1 person found this useful.ow much does a medium sized t-shirt weigh?   On average: Small: 6 oz. Medium: 6.5 oz Large: 7 oz X-Large 7.50 2X-Large 8.75 3X-Large 9.50 But it can vary depending on material.
The short answer is that 500 sheets of bond paper with a size of 17 by 22 have a weight of 20 pounds. The manufacturer would cut a sheet that big into four letter-size sheets, so a 500-sheet ream of 20-pound bond paper weighs 5 pounds.100 sheets weigh 1 pound.1 Sheet weighs .16 ounces.6.25 sheets per ounce.ot an expert here, but I think 20 lbs refers to 2000 sheets, not 500. The weight of a single sheet at 500 sheets per, would be 0.64 oz. - way too much for a sheet of paper, by about a factor of 4.