Lymph nodes are very small clusters of immune cells that function as part of the bodyâs immune system. There are more than 600 lymph nodes throughout the body, but the ones most frequently enlarged or swollen are the lymph nodes in the neck, under the chin, in the armpits, and in the groin.here are more than 600 lymph nodes throughout the body, but the ones most frequently enlarged or swollen are the lymph nodes in the neck, under the chin, in the armpits, and in the groin.
Uses of sulfuric acid. By far the largest amount of sulfuric acid is used to make phosphoric acid, used, in turn, to make the phosphate fertilizers, calcium dihydrogenphosphate and the ammonium phosphates. It is also used to make ammonium sulfate, which is a particularly important fertilizer in sulfur-deficient.
SULFURIC ACID. Sulfuric acid is the product of the U.S. chemical industry produced in largest quantity in terms of mass. About 40 million tons are produced annually. There are two major processes used in the production of H 2 SO 4, lead chamber process and contact process.The lead-chamber process is the older of the two processes, and its product is aqueous sulfuric acid containing 62% to 78% H 2 SO 4.The contact process yields pure sulfuric acid.here are two major processes used in the production of H 2 SO 4, lead chamber process and contact process. The lead-chamber process is the older of the two processes, and its product is aqueous sulfuric acid containing 62% to 78% H 2 SO 4. The contact process yields pure sulfuric acid.