2. How many moles of NO3, will be produced with this amount of oxygen
gas?

The given question is an incomplete question, the complete question is given below.

Use this equation to answer the questions that follow.

5 moles of oxygen gas are present. How many moles of will be produced with this amount of oxygen gas?

Answer : The moles of produced will be 3.33 moles.

Explanation : Given,

Moles of oxygen gas = 5 moles

Now we have to calculate the moles of .

The given balanced chemical equation is:

From the balanced chemical equation we conclude that,

As, 3 moles of gas react to produces 2 moles of gas

So, 5 moles of gas react to produces moles of gas

Therefore, the moles of produced will be 3.33 moles.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.