How can the supply of steel and other raw materials be obtained for the best price

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.)

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?