The chemical equation for the formation of ammonia is unbalanced. 3 cap h sub 2 g plus cap n sub 2 times g rightarrow NH sub 3 times g If three molecules of hydrogen react with one molecule of nitrogen, how many molecules of ammonia would be formed?

Balance the atoms in the reaction: one nitrogen molecule contains 2 nitrogen atoms, and three hydrogen molecules contain 6 hydrogen atoms. Two ammonia molecules contain 2 nitrogen atoms and 6 hydrogen atoms, so 2 molecules of ammonia form. The correct choice is B, 2.

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