ou are given a sample that contains a mixture of the following two arsenic-containing minerals: getchellite (AsSbS3) and paakkonenite (Sb2AsS2). You start with a sample of this mixture that has a mass of 53.56 grams. You perform a reaction that converts the arsenic (As) in these minerals into the form iron(III) arsenate (FeAsO4), and 31.03 grams of this product are obtained. What is the percent by mass of getchellite in the original sample