Question

How many moles of O₂ are needed to react completely with 35.0 mol of FeCl₃? *

4FeCl3 + 302 (ARROW) 2Fe2O3+3Cl2

26.3mol
46.7mol
23.3mol
10.0mol

Answer 1

26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃

Step-by-step explanation:

To determine the number of moles of O₂ that are needed to react completely with 35.0 mol of FeCl₃, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), and rule of three as follows: if 4 moles of FeCl₃ react with 3 moles of O₂, 35 moles of FeCl₃ with how many moles of O₂ will it react?

`molesofO_(2) =(35 moles of FeCl_(3)*3 moles of O_(2) )/(4 moles of FeCl_(3))`

moles of O₂= 26.25 ≅ 26.3

26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃