p chỉ cần cho công thức tương ứng 23x/32.39%=32y/22,54%=16z/45,07%=142/100%
*23x/32,39%=142/100 => x =2
*32y/22,54%=142/100 => y =1
*16z/45,07%=142/100 => z =4
Cuối cùng ta có công thức Na2SO4
1 hop chat co %AI=53%; %0=47% klg mol hop chat la 1029/mol. Xac dinh cong thuc hoa hoc cua hop chat
hop chat Xla mot loai phan bon hoa hoc ,duoc dung kha pho bien trong san xuat nong nghiep.Cong thuc hoa hoc cua X co dang KxSyOz. Thanh phan phan tram theo khoi luong cua cac nguyen to trong X nhu sau :44,83%K ;18,39%S va 36,78%O. Xac dinh cong thuc hoa hoc cua X, biet khoi luong mol cua X la 174g/mol
Cac buoc xac dinh thanh phan phan tram theo khoi lg cua cac ng to trong hop chat khi biet c/thuc hoa hoc cua hop chat.
Xax dinh c/thuc hoa hoc cua hop chat khi biet thanh phan phan tram .
xac dinh cong thuc hoa hoc cua Y biet khoi luong mol cua Y la 85 g/mol
viet cong thuc thuc tinh thanh phan phan tram theokhoi luong cua 1 nguyen to trong hop chat khi biet cong thuc hoa hoc cua hop chat
Mot loai dong oxit 1 mau den co khoi luong mol p/tu la 80g. Oxit nay co thanh phan la 80% dong va 20% oxi. Tim c/thuc hoa hoc cua loai dong oxit tren .
hoa tan 16g oxit cua kim loai A hoa tri khong doi can dung 109,5g dung dich hcl 20% .xac dinh cong thuc cua oxit
lap cong thuc hoa hoc cua oxit sat(tao boi Fe va O)trong do Fe chiem 70% ve khoi luong.Cho khoi luong mol pham tu cua oxit tren la 160/mol
Hay thiet lap bieu thuc tinh so mol chat theo :a so nguyen tu hoac so phan tu cua chat
B khoi luong chat
C the tich doi voi chat khi
