Pls can someone help me?

219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c → fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?