求有心人分享一下溫chem的方法

meow喵

0.0睇黎我chem都係拜拜...靠a-math同bio拉分了(默

〝黑之神〞

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

計數的完全失敗.......嗚

lkhj2525

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[[yoyo_196]]
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!

meow喵

53# lkhj2525 第一條:exceptions ammonim compounds
第2條 唔係吧-_-H算唔算

wilson1993912

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[[yoyo_196]]
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

溫度愈高solute 既solubility愈低呢個應該係讀science既common sense黎

韓信

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[[yoyo_196]]
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

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

lkhj2525

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

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

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

韓信

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

Zend

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

不一定的

Magnesium sulfate

MgSO4

22

28.2

33.7

38.9

44.5

54.6

55.8

52.9

50.4

Manganese(II) sulfate

MnSO4

52.9

59.7

62.9

62.9

60

53.6

45.6

40.9

35.3

Calcium sulfate

CaSO4.2H2O

0.223

0.244

0.255

0.264

0.265

0.244

0.234

0.205

from 0'C to 100'C, some missing part

＊林、

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?