1. What is the pH at which a 10.0mM Os(NO3)2 will precipitate Os (OH)2 (s)? K3p of Os (OH)2 is 4.92 x 10^10 at 25.0C

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Helium decays to form lithium. which equation correctly describes this decay?