What are the units of Kc for the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g)?
Correct answer D. mol⁻² dm⁶
Explanation
Kc = [NH₃]² / ([N₂][H₂]³), giving (mol dm⁻³)² / (mol dm⁻³)⁴ = (mol dm⁻³)⁻², which equals mol⁻² dm⁶. Units of Kc always depend on the powers in the expression.
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