1 .. which means an equilibrium will form, so there is no chance of 100% yield even if you use, as you actually do, the theoretical reactant ratio of nitrogen: hydrogen of 1: 3 2  ! In forming ammonia 92kJ of heat energy is given out (i.e. exothermic, 46kJ of heat released per mole of ammonia formed).
Ingestion of rat poison may also be a cause of improper blood clotting. Hematemesis may also follow a traumatic incident, such as severe burns, heat stroke, major surgery, exposure to poisons from heavy metals, such as iron or lead, and snake bites. Exposure to toxic plants and pesticides may also cause vomiting of blood. Critically ill animals are at a higher risk for hematemesis.
The causes of vomiting differ according to age. For children, it is common for vomiting to occur from a viral infection, food poisoning, milk allergy, motion sickness, overeating or feeding, coughing, or blocked intestines and illnesses in which the child has a high fever. The timing of the nausea or vomiting can indicate the cause. When appearing shortly after a meal, nausea or vomiting may be caused by food poisoning, gastritis (inflammation of the stomach lining), an ulcer, or bulimia. Nausea or vomiting one to eight hours after a meal may also indicate food poisoning. However, certain food- borne bacteria, such as salmonella, can take longer to produce symptoms.