Question

can you please answer this question ??​

Answer 1

Answer:

Explanation:

Since there is excess hydrogen, that means that the concentration of hydrogen is not limiting. The equation is balanced so we also don't have to worry about balancing.  

When we have a balanced chemical equation/reaction, we basically have a conversion tool. Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3. Since we have the amount of N2 and excess of hydrogen, we only need to work with the amount of N2. As we said before, for every mole of N2 we get 2 moles of NH3 and using this proportions we can make a conversion tool and calculate how many moles of NH3 we obtain from 2.5 moles of N2.  

2.5 moles of N2 * (2 moles of NH3/ 1 mole of N2) = moles of NH3

We place the N2 on the bottom of the fraction in order to cancel out the units and obtain moles of NH3.

2.5 moles of N2 * (2 moles of NH3/ 1 mole of N2) = 5 moles of NH3

We end up with 5 moles of NH3.