The apparatus below contains ammonia, neon, and hydrogen chloride gases at a temperature of 27°C. The valve in the center is opened and the ammonia reacts with the hydrogen chloride. Assume the reaction goes to completion. NH3 (g) + HCl(g) → NH4 Cl(s) a. How many moles of ammonia and HCl are present initially? b. Which reactant is the limiting reactant? c. How many moles of the excess reactant are left over?

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