| T O P I C R E V I E W |
| taituhollywood |
Posted - 02/21/2003 : 20:23:50
cho mot kim loai chua biet hoa tri tac dung voi 200ml NaoH 0,5M , biet rang kim loai khoi luong kim loai do dung la 200g . Hay xac dinh ten kim loai do va viet phuong trinh .
taitu
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| 12 L A T E S T R E P L I E S (Newest First) |
| phongluu |
Posted - 04/06/2003 : 16:17:53
tai tu bai cua ong thieu du kien lam sao ma giai duoc
huy
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| xine-danlinh |
Posted - 04/06/2003 : 08:52:38
nay taitu chi tuong tuong hoi phong phu day !
1112
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| salem85 |
Posted - 04/05/2003 : 22:51:13
� t�i tử, b�a của tui đ�ng hay sai g� cũng phải n�i cho người ta biết với chứ
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| salem85 |
Posted - 03/19/2003 : 21:36:14
Goi kim loai do la A, hoa tri n, ta co phuong trinh :
A + (4- n)OH- + (n-2)H2O = AO2(4-n)- + n/2H2
So mol OH- = 0,1 mol => so mol A = 0,1/(4-n) => khoi luong mol A = 2000. (4-n). Thay n = 1,2,3 vao bieu thuc => khong co nghiem thoa. Bai nay co sai de khong vay?
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| taituhollywood |
Posted - 03/19/2003 : 20:04:04
bac bka noi dung do . day du du llieu roi ma , cac ban gang lam di co thuong hehehhehehehe
taitu
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| shang |
Posted - 03/18/2003 : 21:15:33
bac BKA sao mai~ ko thay pos bai` len vay tui cho` lau we' rui` hic hic ...........hic Neu' bac ko lam` duoc thi` dung` noi' nhu vay chu' ..........===> buon` lem'
THIEU GIA HO NGUYEN TEN HAI
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| tuananh_dng |
Posted - 03/11/2003 : 10:48:16
hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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| BKA |
Posted - 03/09/2003 : 10:11:51
bai nay du du kien roi do cac ban cu lam di neu ko duoc 2 ngay nua minh dua dap an
cho cac ban 2 ngay
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| prince18th |
Posted - 03/09/2003 : 08:08:04
t�n t�i tử đ�u rồi ?
__________________
But... I can't help falling in love with you....
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| hocsinhguongmau |
Posted - 03/08/2003 : 19:30:48
cai nao du
du bao nhieu
tac dung vua du ?
muoi sau p/u nang 200 g?
chang hieu gi ca
viet the thi nguyen ba ngoc cung cha lam duoc
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| shang |
Posted - 02/27/2003 : 10:31:25
lam` on cho tui them du~ kien di neu' ko thi` chac chi? co' mo` ra thoi ko lap luan chac chan duoc dau.
THIEU GIA HO NGUYEN TEN HAI
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| datacnhang1 |
Posted - 02/24/2003 : 14:32:59
BAI NAY QUA MO HO DO
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