PTHH
A2On + 2nHCl-->2ACln+ nH2O
\(\frac{16}{2A+16n}\) 0.6 mol
=> \(\frac{16}{2A+16n}=\frac{0.6}{2n}\) => n = 3 thì A= 56
Vậy ct oxit Fe2O3
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
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 .
xac dinh cong thuc hoa hoc cua Y biet khoi luong mol cua Y la 85 g/mol
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
1 hop chat co %AI=53%; %0=47% klg mol hop chat la 1029/mol. Xac dinh cong thuc hoa hoc cua hop chat
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 .
hoa tan 8,1g nhom bang dung dich H2SO4 loang ,vua du nong do 12,25pt
a, tinh kl H2SO4can dung b,tinh nong do pt cua dung dich muoi sau phan ungHoa tan 50g tinh the CuSO4.5H2O thi nhan duoc dung dich co khoi luong rieng bang 1,1g/ml.Hay tinh nong do % va nong do MOL cua dung dich thu duoc.
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