Most fertilizers contain ammonia (NH3). Ammonia forms when hydrogen reacts with nitrogen. Which equation correctly represents the chemical reaction that forms ammonia?

A. 3H2 + N2 → NH3

B. H2 + N2 → 2NH3

C. H2 + N2 → NH3

D. 3H2 + N2 → 2NH3

The correct answer is: D. 3H2 + N2 → 2NH3

Ammonia (NH3) is a colourless gas with a characteristic pungent smell with wide use. Ammonia is a common nitrogenous waste, specially among aquatic organisms, and it is a precursor to food and fertilizers to terrestrial organisms. It is used as building block for the synthesis of many pharmaceutical products and cleaning products.

Answer

The correct option is D.

Explanation with reason

According to balance chemical equation

A. 3H2 + N2 → NH3

in the above reaction there are 6 mole of hydrogen atom and 2 mole of nitrogen atom on reactant side, one mole of nitrogen atom and 3 mole of hydrogen atom on product side. This is not a balance chemical equation.

B. H2 + N2 → 2NH3

There are 2 mole of hydrogen atom and 2 mole of nitrogen atom on reactant side and 2 mole of nitrogen and 6 mole of hydrogen atom on product side. This is not a balance chemical equation.

C. H2 + N2 → NH3

There are 2 mole of hydrogen as well as nitrogen atom on reactant side and i mole of nitrogen and 3 mole of hydrogen atom on product side. so, this is also not a balance chemical equation.

D. 3H2 + N2 → 2NH3

There are 6 mole of hydrogen atom and 2 mole of nitrogen atom on both side. So this is a balance chemical equation.

Conclusion

It is concluded from above discussion that D equation correctly represents the chemical reaction that form ammonia.