Explain how the separation of the following mixtures is carried out: a. Mixture of alum from impure samples
b. Components of blood and urine
c. Mixture of iron filings, sand and husk
d. Mixture of sand, water and salt

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.)

What three things determine the shape and size of a puddle when water is poured out onto a surface

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =