1 Flourine gas is placed in contact with Calcium metal at high temperatures to produce Calcium Fluoride powder. What is the formula equation for this
reaction?
F2(g) + Ca(s) ---> CaF20)
F2(g) + Na(s) ---> NaF20)
F2(g) + Na(s) ---> NaF21s)
F2(g) + Ca(s) ---> CaF2(s)

Which of these conditions most likely produces an unstable isotope?

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

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.