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.
2 ways thay oxygen is carried. The blood carries oxygen in two ways. As it does not easily dissolve in water, only a little is carried in the blood plasma the rest combines with the haemoglobin in red blood cells and is transported thus. The key instrument for moving it around is of course your heart.