A student prepared a 1:1 buffer, for which [HAc] = [Ac-] = 0.05494 M. Using their 1:1 buffer and a 0.09381 M HCl solution, the student prepared Solution C in Part 3 of the experimental procedure. Given this information, how many moles of HCl were there in the student's Solution C before a reaction took place? Report your final answer, in moles, to 6 decimal places and only include the numerical value (no units). Do not use scientific notation to answer this question.