Question

Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3). Which equation correctly represents this reaction?

A.
N + H → NH

B.
2N2+ H2 → 3NH3

C.
2NH → N + 3H2

D.
N2+ 3H2 → 2NH3

Answer 1

its D

Answer 2

let's break this down first

Answer 3

Hi @zoeeh127

Nitrogen and hydrogen gas exist as diatomic molecules Di means two atoms are bonded together. and in the gaseous state.

We know that nitrogen and hydrogen combine to form Ammonia but let's take alook at this equation.

so we start with this.

\[N_{2} + H_{2} \rightarrow NH_{3}\]

The law of conservation of matter says that we need to ensure that the number of atoms is the same for each reactant and product in our chemical reaction.

which means that energy can neither be created nor destroyed.

You can see that we have 2 atoms of nitrogen and 2 atoms of hydrogen, but only 1 atom of nitrogen and 3 atoms of hydrogen.

We need to balance this by putting coefficients or numbers in front of the reactants and products.


\[N_{2} + 3H_{2} \rightarrow 2NH_{3}\]

We put the three in front of hydrogen so that means 3*2 6 atoms of hydrogen
and a 2 in front of NH3 so that means we have 2 atoms of nitrogen and 6 atoms of hydgrogen on both the reactants and product sides so that's how we know this equation is balanced.

Answer 4

ok makes sense thank you so much