Mot hop chat khi co thanh phan % theo khoi luong la 82,35%N va 17,65% H. xac dinh cong thuc hoa hoc cua chat do. Biet ti le khoi cua hop chat khi voi hidro bang 8,5.

Cho 7.2g mot loai oxit sat tac dung hoan toan voi khi hidro cho 5.6g sat. Cong thuc cua oxit sat?

bai 1

Mot oxit kl M co cong thuc MxOy do M chiem 72,41%khoi luong. Khu hoan toan oxit bang khi CO. thu duoc 16,8g kl M. mat khac cho luong oxit tren tac dung voi m gam dung dich HCl, thu duoc dung dich B

Tim nong do % cua dd B

1. cho 4,48 g 1 oxit hl co hoa tri khong doi tac dung het voi 7,84 g \(H_2SO_4\). Xac dinh cong thuc oxit

2. hoa tan hoan toan 1 g oxit cu KIR can 25ml dung dich hon hop gom \(H_2OS_4\) 0,25M, HCl 1M . Tim cong thuc oxit

sat tao duoc 3 loai oxit (oxit la hop chat cua oxi voi nguyento khac ) X,Y ,Z .Trong do thanh phan tram ve khoi luong cua fe trong X,Y,Z LAN LUOT la 77,778% ,74,414%,70%.khoi luong phan tu cua X,Y,ZLAN LUOT LA 72,232, 160

XAC DINH CONG THUC HOA HOC X,Y,Z

Nung 9,28 gam hon hop A gom FeCO3 va 1 oxit sat trong khong khi den khoi luong khong doi. Sau khi phan ung xay ra hoan toan , thu duong 8 gam mot oxit sat duy nhat va khi CO2 .Hap thu het luong khi CO2 vao 300ml dung dich Ba(OH)2 0,1M, ket thuc phan ung duoc 3,94 gam ket tua.Tim cong thuc cua oxit

hoa tan 16g mot oxit kl co cong thuc R2On bang dung dich H2SO4 19,6% thu duoc dung dichX 27 59%

a) xac dinh cong thuc cua R₂O_n

_{b) lam bay hoi dung dich X thu duoc 50g chat ran Y . tim Y}

 cho 6.72 gam kim loai M tac dung vua du voi dung dich chua 0.12 monl h2so4. xac dinh oxit kim loai M , biet trong oxit M chiem 70% ve khoi luong.

Cho 4,48g mot oxit cua kim loai hoa tri 2 tac dung het 7,84 axit H2SO4. Xac dinh cong thuc hoa hoc tren

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