mot hop chat gom 2 nguyen to la X&O, biet X co hoa tri III &X chiem 70% ve KL phan tu cua hop chat . Biet phan tu cua hop chat nang gap 5 lan phan tu khi Oxi . Xac dinh nguyen to hoc hoc X.
BAI NAY CO TRONG SBT HOA NHA CAC BAN ;BAI 9.8 do
hop chat A tao boi 1 nto la nito va oxi . Nguoi ta xac dinh dc rang , trong ti le khoi luong giua 2 nto trong A = Mn/Mo =7/2
Viet CTHH va tinh PTK cua A
xac dinh cong thuc hoa hoc cua nhom oxit , biet ti le khoi cua 2 nguyen to nhom va oxit bang 4,5:4
phan tu x co phan tu khoi gap 2 lan phan tu khoi cua oxi x tao nen tu 2 nguyen to luu huynh va oxi.Xac dinh cthh cua oxi
giup mik nha
Khi dot nong 1 gam magie ket hop voi 2,96 gam clo tao ra hop chat magie clorua. Hay tim CTHH cua hop chat magie clorua, biet phan tu cua hop chat chi co 1 nguyen tu magie.
Cho hop chat a co cong thuc R2O
Biet rang 0.25 mol hop chat a co khoi luong la 15.59.hay xac dinh cong thuc hoa hoc cua a
Tìm cthh cua hop chat gom nguyen to R hoa tri 5 voi oxi va phan tu khoi cua chat do voi hidro la 71
chat A tao boi a nguyen tu X va b nguyen tu Fe .moi phan tu A gom 3 nguyen tu;phan tu khoi cua A bang 120đvc.tim X
cho 7,2 g kim loai chua biet hoa triphan ung hoan toan0,6mol hcl .xac dinh kim loai