How do you calculate the abundance of an atom and the relative atomic maths? as simply as possible?

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Which three statements represent the benefits of performing experiments using computer simulations?