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An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature by the reaction 3 H2(g) + N2(g) ⇌ 2 NH3(g) At equilibrium, the concentration are [H2] = 6.0 M, [N2] = 10 M, and [NH3] = 4.0 M. What ere the concentrations of nitrogen gas and hydrogen gas that were reacted initially?