Reactant molecules are any substance that goes into a reaction. When forming product molecules, the reactant molecules combine and create a new molecule (i.e. the combination of methane and oxygen can make carbon dioxide and water).
The class of compounds that ammonia belongs to is it is categorized as a basic compound. As it posses a pH value or rating above 7, which is characteristic of basic substances, solutions.
Answer:
is the total pressure of the tank.
Explanation:
Partial pressures of nitrogen = 
Partial pressure of oxygen = 
Total pressure of gases in the tank = P
Applying Dalton's law of partial pressures :
is the total pressure of the tank.
