What is the daughter nucleus (nuclide) produced when 213 Bi undergoes alpha decay? Replace the question marks with the proper integers or symbols.

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

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