chỉ dùng 1 thuốc thử, bằng phương pháp hóa học hãy nhận biết 4 dung dịch sau: k2so4, naoh, fecl3, h2so4

1. list three scientific reasons cockroaches may fly.

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Iron (fe) reacts with copper sulfate (cuso4) to form iron (ii) sulfate. in this reaction, cu2+ gains electrons to form cu. which statement is true about this reaction? fe(s) + cuso4(aq) → feso4(aq) + cu(s)