bằng phương pháp hóa học, hãy tách riêng từng chất trong hỗn hợp chất răn sau: cuo, fe2o3, sio2. Viết phương trình hóa học xảy ra

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.