Why is kcl soluble in water but not in toluene​

If 200.0g of copper(ll) sulfate react with an excess of zinc metal, what is the theoretical yield of copper

What type of reaction fuels the processes seen here?

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.