predict how many absorption bands would be in the uv vi's spectrum of the hexachloronickelate (ii) ion stating the origin of the peaks and order of energy or wavelength of the peaks​

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

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 a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j