Question 1 if we mixed 45cm^3 of 2m naoh with 20cm^3 of 1m hcl and obtained a temperature difference of 9.4°c, what would be the heat of reaction, the enthalpy? . question 2 if we added 10cm^3 hcl of an unknown concentration to 30cm^3 of 2m naoh and obtained a temperature change of 4.5°c and then added 20cm^3 of the same unknown acid to 30cm^3 of 2m naoh and obtained a temperature change of 9.0°c, what is the concentration of the acid? use the enthalpy value from question 1

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.

The biosphere of the earth is made up of what compound? organic or inorganic?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.