What effect does a catalyst have on the energy of a reaction system? HELP ASAP PLZ!! A.) It increases the initial energy of the reactants
B.) It reduces the activation energy
C.) It reduces the final energy of the products
D.) It has no effect on the energy of a reaction system

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?

The unit of resistivity is the: ohm ohm-cm volt coulomb