Question

ammonia is commonly used as a fertilizer for plants. it is made when nitrogen gas and hydrogen gas react under specific conditions. consider the following reaction: 3 molecules of nitrogen (n₂) react with 9 molecules of hydrogen (h₂) to produce some amount of ammonia (nh₃). complete the table below. chemical element | number of atoms in the reaction h | blank n | blank during this reaction, how many molecules of ammonia (nh₃) are produced? blank submit work it out not feeling ready yet? this can help: count atoms and molecules in chemical reactions (1:16)

Explanation:

For the number of H atoms:

Step1: Analyze H₂ molecules

Each \( \text{H}_2 \) molecule has 2 H atoms. There are 9 \( \text{H}_2 \) molecules.
So the number of H atoms is \( 9\times2 = 18 \).

For the number of N atoms:

Step1: Analyze N₂ molecules

Each \( \text{N}_2 \) molecule has 2 N atoms. There are 3 \( \text{N}_2 \) molecules.
So the number of N atoms is \( 3\times2 = 6 \).

For the number of \( \text{NH}_3 \) molecules:

Step1: Write the balanced reaction

The reaction is \( \text{N}_2 + 3\text{H}_2
ightarrow 2\text{NH}_3 \) (balanced). From the given, moles (molecules) of \( \text{N}_2 = 3 \), \( \text{H}_2 = 9 \). The ratio of \( \text{N}_2:\text{H}_2 \) in reaction is \( 1:3 \), here \( 3:9 = 1:3 \), so it's stoichiometric.
From the reaction, 1 molecule of \( \text{N}_2 \) produces 2 molecules of \( \text{NH}_3 \). So 3 molecules of \( \text{N}_2 \) will produce \( 3\times2 = 6 \) molecules of \( \text{NH}_3 \). Also, checking H: 9 \( \text{H}_2 \) (18 H atoms) and each \( \text{NH}_3 \) has 3 H atoms, so number of \( \text{NH}_3 \) from H is \( \frac{18}{3}=6 \), which matches.

Answer:

s:

• Number of H atoms: \( \boldsymbol{18} \)
• Number of N atoms: \( \boldsymbol{6} \)
• Number of \( \text{NH}_3 \) molecules: \( \boldsymbol{6} \)