Atetrahedral field presents four sets of ligand electrons, whereas an octahedral field presents six sets of ligand electrons. is the electron repulsion smaller, larger, or roughly the same in the tetrahedral case?

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

How does the viscosity of magma change as magma cools?