1.91 g h2 is allowed to react with 9.86 g n2, producing 1.74 g nh3. what is the theoretical yield in grams for this reaction under the given conditions? express your answer to three significant figures and include the appropriate units.

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?

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.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.