Are chemical changes substance present in food​

After cloud droplets form, what must happen to them for precipitation to occur?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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.)