Consider the balanced equation. cap n sub 2 plus 3 cap h sub 2 rightarrow 2 NH sub 3 What is the mole ratio of hydrogen to ammonia?

In a balanced chemical equation, the coefficients give the mole ratios. The equation uses 3 moles of hydrogen (H₂) for every 2 moles of ammonia (NH₃), so the ratio of hydrogen to ammonia is 3 to 2. Therefore, the correct choice is “ratio of 3 to 2.”

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