0.0睇黎我chem都係拜拜...靠a-math同bio拉分了(默
0.0睇黎我chem都係拜拜...靠a-math同bio拉分了(默
meow喵 發表於 2-4-2009 17:23 http://nakuz.com/bbs/images/common/back.gif
計數的完全失敗.......嗚
本帖最後由 lkhj2525 於 2-4-2009 11:20 編輯
我想搭單問下chem有咩書無但係要知?
例如neutralization係fast reaction /
溫度愈高solute 既solubility愈低
順便問多2條[]
點解(NH4)2NO3 有ionic bond
係米1個molecue既relative molecular mass永遠唔等於另一個molecue?
thx!
53# lkhj2525 第一條:exceptions ammonim compounds
第2條 唔係吧-_-H算唔算
我想搭單問下chem有咩書無但係要知?
例如neutralization係fast reaction /
溫度愈高solute 既solubility愈低
順便問多2條[]
點解(NH4)2NO3 有ionic bond
係米1個molecue既relative molecular mass永遠唔 ...
lkhj2525 發表於 2-4-2009 19:13 http://nakuz.com/bbs/images/common/back.gif
溫度愈高solute 既solubility愈低呢個應該係讀science既common sense黎
我想搭單問下chem有咩書無但係要知?
例如neutralization係fast reaction /
溫度愈高solute 既solubility愈低
順便問多2條[]
點解(NH4)2NO3 有ionic bond
係米1個molecue既relative molecular mass永遠唔 ...
lkhj2525 發表於 2-4-2009 19:13 http://www1.nakuz.com/bbs/images/common/back.gif
1首先隻CHEMICAL係NH4NO3
NH4係1+
NO3係1-
兩隻都係ION 所以咪FORM IONIC BOND
REMINDED THAT
BONDING BETWEEN N&H in NH4
BONDING BETWEEN N&O in NO3
都係COVALENT BOND
2.有時D野冇得話永遠
同埋呢條問題有D怪= =
佢鐘意出一隻CHEMICAL 叫X
跟住個MASS佢地作,,,,,冇話一唔一定
溫度愈高solute 既solubility愈低呢個應該係讀science既common sense黎
wilson1993912 發表於 3-4-2009 13:30 http://www.nakuz.com/bbs/images/common/back.gif
咁仲有d咩common sense要知?
1首先隻CHEMICAL係NH4NO3
NH4係1+
NO3係1-
兩隻都係ION 所以咪FORM IONIC BOND
REMINDED THAT
BONDING BETWEEN N&H in NH4
BONDING BETWEEN N&O in NO3
都係COVALENT BOND
2.有時D野冇得話永遠
同埋呢條問題 ...
韓信 發表於 3-4-2009 16:27 http://www.nakuz.com/bbs/images/common/back.gif
1.我仲以前metal同non-metal先form 到ionic bond添
2.例如CH4 同O2都唔同
不過係米真係有就唔知
本帖最後由 韓信 於 4-4-2009 17:25 編輯
指以你教CHEM一定死得人多=_=
溫度愈高solute 既solubility愈高
溫度愈高GASES 既solubility愈低
溫度愈高solute 既solubility愈低呢個應該係讀science既common sense黎
wilson1993912 發表於 3-4-2009 21:30 http://nakuz.com/bbs/images/common/back.gif
不一定的
Magnesium sulfateMgSO42228.233.738.944.5
54.6
55.852.950.4
Manganese(II) sulfateMnSO452.959.762.962.960
53.6
45.640.935.3
Calcium sulfateCaSO4.2H2O0.2230.2440.2550.2640.265
0.244
0.234
0.205
from 0'C to 100'C, some missing part
NH3 係中性架咩....?
06年有條MC:
在Co(NH3)4Cl2中,鈷的氧化數係幾多.....答案唔係-2,係+2
整個NH3氧化數唔係+1咩?