In the balanced chemical equation for the synthesis of ammonia, N2 + 3H2 → 2NH3, what is the mole ratio of NH3 to N2?

• A. 2:1
• B. 1:2
• C. 1:3
• D. 3:2

Answer: (A)

Verified step by step guidance

1. Identify the balanced chemical equation given: \(\mathrm{N_2 + 3H_2 \rightarrow 2NH_3}\).
2. Look at the coefficients in front of each compound to determine the mole ratios. The coefficient in front of \(\mathrm{N_2}\) is 1, and the coefficient in front of \(\mathrm{NH_3}\) is 2.
3. The mole ratio of \(\mathrm{NH_3}\) to \(\mathrm{N_2}\) is the ratio of their coefficients, which is \$2:1$.
4. This means for every 1 mole of \(\mathrm{N_2}\) consumed, 2 moles of \(\mathrm{NH_3}\) are produced.
5. Therefore, the mole ratio \(\mathrm{NH_3 : N_2}\) is \$2:1$.