School and Work

Equation= Fe2O3 + 3 CO yields 2 Fe + 3 CO2.
Based on the equation, a certain amount of Fe2O3 reacted with excess CO gas yielding 185 grams of Fe. If the percentage yield is 84.9%, how many grams of Fe2O3 reacted?

*If you can help, please show your work, telling me where certain numbers or conversion factors came from! Appreciate it immensely, thanks!

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