The initial concentrations of ethylene oxide and water are 1.0 lbmol/ft^3 and 3.47 lbmol/ft^3, respectively. If the rate constant is 0.1 L/(mol*s) at 300 K with an activation energy of 12,500 cal/mol, calculate the space time needed for 90% conversion of ethylene oxide in: 1. A CSTR operated at 300 K
2. A CSTR operated at 350 K.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

What is the polyatamic ion of borate

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!