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 .
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
xac dinh cong thuc hoa hoc cua Y biet khoi luong mol cua Y la 85 g/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 .
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
khu hoan toan 5.43g hon hop gom dong oxit va chi oxitva bang khi hidro thu dc 0.9g h2o
a tinh thanh phan phan tram theo khoi luong cac oxit trong hon hop ban dau .
b tinh thanh phan phan tram khoi luong cua cac chat ran thu dc sau pha ung
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
Hoa 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.