alan_given 發表於 2005-5-17 13:33:01

Originally posted by MatthewChor at 2005-5-17 13:31:
29,36...anyone can explain:icon099:

29-唔知
36-decreases down the group喎

2076 發表於 2005-5-17 13:33:09

Originally posted by MatthewChor at 2005-5-17 01:32 PM:

yes.....2PbO + PbO2 = Pb3O4:o



i use 2元1次聯立方程解:icon101:

TAMTOM 發表於 2005-5-17 13:33:42

Originally posted by 2076 at 2005-5-17 13:33:


i use 2元1次聯立方程解:icon101:
:icon101::icon063:....:icon112:

alan_given 發表於 2005-5-17 13:33:50

Originally posted by MatthewChor at 2005-5-17 13:32:

yes.....2PbO + PbO2 = Pb3O4:o

it hv round off problem:icon066::icon066::icon066:
Pb should 90.7% by mass:icon101:

好~delete佢:icon101:

MatthewChor 發表於 2005-5-17 13:34:07

Originally posted by 2076 at 2005-5-17 01:32 PM:


29 cannot explain
seems that 1st statement correct but 2nd wrong:icon062:

36 越底metallic bond越弱
29.....yes lor
36.....that's why melting pt decrease?:icon101:
         why not reducing power ge:icon101:

MatthewChor 發表於 2005-5-17 13:34:50

Originally posted by alan_given at 2005-5-17 01:33 PM:


好~delete佢:icon101:
要我sub 2:3 同 3:4:icon099:

2076 發表於 2005-5-17 13:34:59

Originally posted by MatthewChor at 2005-5-17 01:34 PM:

29.....yes lor
36.....that's why melting pt decrease?:icon101:
         why not reducing power ge:icon101:

越大lose electrons 越容易=>reducing power increases

TAMTOM 發表於 2005-5-17 13:35:27

Originally posted by alan_given at 2005-5-17 13:33:


好~delete佢:icon101:
:icon040::icon075::icon065::icon112::icon112::icon112::icon112::icon112::icon112:

2076 發表於 2005-5-17 13:35:33

Originally posted by MatthewChor at 2005-5-17 01:34 PM:

要我sub 2:3 同 3:4:icon099:

i calculate 1:1.34
not need sub wor:icon101:

pancake 發表於 2005-5-17 13:35:37

Originally posted by MatthewChor at 2005-5-17 01:34 PM:

29.....yes lor
36.....that's why melting pt decrease?:icon101:
         why not reducing power ge:icon101:
36 ichoose b also:o

2076 發表於 2005-5-17 13:36:14

Originally posted by pancake at 2005-5-17 01:35 PM:

36 ichoose b also:o

我覺得一定唔係

btw 第48題係...

MatthewChor 發表於 2005-5-17 13:36:23

Originally posted by 2076 at 2005-5-17 01:34 PM:


越大lose electrons 越容易=>reducing power increases
get the wrong meaning:icon099::icon099::icon099:
I think it is ability to gain electron....

should be 48/50:icon099:

TAMTOM 發表於 2005-5-17 13:36:41

Originally posted by 2076 at 2005-5-17 13:36:


我覺得一定唔係

btw 第48題係...
我選B

MatthewChor 發表於 2005-5-17 13:37:06

Originally posted by 2076 at 2005-5-17 01:35 PM:


i calculate 1:1.34
not need sub wor:icon101:
我round off左...:icon062:

2076 發表於 2005-5-17 13:37:21

Originally posted by TAMTOM at 2005-5-17 01:36 PM:

我選B

x2

我覺得enhance依個字係關鍵
but o個d 3大神全部揀A wor

TAMTOM 發表於 2005-5-17 13:37:26

36 唔係A 咩?

pancake 發表於 2005-5-17 13:37:31

Originally posted by 2076 at 2005-5-17 01:36 PM:




btw 第48題係...
A

2076 發表於 2005-5-17 13:38:05

Originally posted by TAMTOM at 2005-5-17 01:37 PM:
36 唔係A 咩?

i choose a:icon112:

MatthewChor 發表於 2005-5-17 13:38:07

Originally posted by 2076 at 2005-5-17 01:37 PM:


x2

我覺得enhance依個字係關鍵
but o個d 3大神全部揀A wor
A la...

TAMTOM 發表於 2005-5-17 13:38:27

Originally posted by MatthewChor at 2005-5-17 13:36:

get the wrong meaning:icon099::icon099::icon099:
I think it is ability to gain electron....

should be 48/50:icon099:
都有A啦...:icon101:
唔好學個D 人咁啦.."我錯左3題 ,好驚A 唔到啊:icon099:":icon101:
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