If a team official, substitute, substituted or sent off player or outside agent enters the field of play the referee must: 1  only stop play if there is interference with play. 2  have the person removed when play stops. 3  take appropriate disciplinary action.
The bicarbonate ion (hydrogencarbonate ion) is an anion with the empirical formula H C O 3 â and a molecular mass of 61.01 daltons; it consists of one central carbon atom surrounded by three oxygen atoms in a trigonal planar arrangement, with a hydrogen atom attached to one of the oxygens.
In humans, each red blood cell carries about 250,000 molecules of hemoglobin which can transport both oxygen and carbon dioxide. Hemoglobin is a molecule made of two separate components: the protein globin and the nonprotein heme groups.Heme belongs to a group of molecules classified as porphyrins.n humans, each red blood cell carries about 250,000 molecules of hemoglobin which can transport both oxygen and carbon dioxide. Hemoglobin is a molecule made of two separate components: the protein globin and the nonprotein heme groups. Heme belongs to a group of molecules classified as porphyrins.