Ba(OH)₂.H₂O

1858-1873: lam nee tham gia khang chien chong mi 

1873-1884: lam nee tut rank tu chien /hu hu/

1885 - cuoi the ki 19: c4 ganh team ho cuoc khang chien chong mi ket thuc /hi hi/

hoa tan 22 gam hon hop 2 kim loai nhom va sat tac dung bang dung dich axit clohidric du sinh ra 17.92 lit khi h₂ (dktc)

a. Tinh khoi luong cua moi kim loai trong hon hop tren 

b. Tinh khoi luong chat ran thu duoc sau phan ung khi cho toan bo khi h₂thu duoc o tren tac dung hoan toan voi 68 gam dong (2) oxit. biet hieu suat phan ung la 80% 

c. dan toan bo luong khi h₂tren di qua ong su chua 56 gam CuO. ket thuc phan ung thu duoc 47.488g chat ran. tinh hieu suat phan ung.