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
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
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
1 hop chat co %AI=53%; %0=47% klg mol hop chat la 1029/mol. Xac dinh 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 .
Hop chat A co so mol =142 . Na=32,39% ; S = 22,54% ,con lai la Oxi . Xac dinh cong thuc hpa hoc A
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 16g oxit cua kim loai A hoa tri khong doi can dung 109,5g dung dich hcl 20% .xac dinh cong thuc cua oxit
