Final answer:
To react 11.47 moles of hydrochloric acid completely according to the equation 4HCl + O₂↗2H₂O + 2Cl₂, 2.8675 moles of oxygen gas are needed.
Step-by-step explanation:
The question asks how many moles of oxygen gas are required to react completely with 11.47 moles of hydrochloric acid (HCl) according to the given chemical equation. Based on the equation 4HCl + O₂↗2H₂O + 2Cl₂, for every 4 moles of HCl, 1 mole of O₂ is required. Therefore, we can set up the ratio as:
4 mol HCl : 1 mol O₂
To find the amount of O₂ needed for 11.47 moles of HCl, we have:
11.47 mol HCl × (1 mol O₂ / 4 mol HCl) = 2.8675 moles of O₂
Thus, the complete reaction of 11.47 moles of hydrochloric acid with oxygen gas would require 2.8675 moles of oxygen gas.