Astudent is given a 3.147 g mixture of iron fillings, calcium chloride and sand. she separates the mixture and recovers 1.020 g of iron, 1.321 g of sand and 0.753 g of calcium chloride. calculate the percentage of each component she recovered from the original mixture and the percent of material she lost during the separation process. show your steps .

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.