Can someone help me to answer this correctly, please, and explain it. Please answer these 2 short questions, I don't have more money to buy more questions. These 2 questions are different.

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1. b.

For the following reaction, 3.18 grams of oxygen gas are mixed with excess sulfur dioxide. The reaction yields 12.0 grams of sulfur trioxide. SO2(g)+O2(g)SO3(g) What is the theoretical yield of sulfur trioxide? Theoretical yield = g What is the percent yield for this reaction? Percent yield = % It is desired to produce 6.07 grams of iron(III) oxide by the following reaction. If the percent yield of iron(III) oxide is 68.1%, how many grams of iron would need to be reacted? iron(s)+oxygen(g)iron(III)oxide(s)