Which of the following statements regarding hydrogen bonding in secondary structures is true? a both a-helices and b-sheets only use interchain hydrogen bonds b both a-helices and b-sheets only use interchain hydrogen bonds c a-helices only use intrachain hydrogen bonds and sheets can use either intrachain or interchain hydrogen bonds d a-helices can use either intrachain or interchain hydrogen bonds and b-sheets can only use interchain hydrogen bonds

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

Vi limitens. vastery test select the correct answer. which statement explains why large atoms are more reactive than small atoms? a. large atoms have valence electrons farther from the nucleus and lose them more readily. b. large atoms have greater ionization energy, which they can utilize during a reaction. c. large atoms have a greater number of electrons that they can lose during a reaction. d. large atoms have more energy levels, so they have more energy to pass on in a reaction. reset next