what is the freezing point depression of a solution containing 3mol of mgc12 dissolved into 300g of h2o

Explanation for basic character?

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.)

How is the use of hydroelectric power related to the sun